Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Global Warming

Wednesday, 13 August 2014

Climate Change Impacts

As environmental change influences transportation, it will be paramount to see how transportation base may be affected over the short- and long haul. This segment gives assets on the conceivable effects of environmental change on U.s. transportation frameworks.


Coastal Sensitivity to Sea Level Rise: A Focus on the Mid-Atlantic Region (2009)

Ecological Protection Agency. A report by the U.s. Environmental Change Science Program and the Subcommittee on Global Change Research.

This report is proposed to give data about the affectability and flexibility of distinctive characteristic and oversaw environments and human frameworks to atmosphere and related worldwide changes by giving a nitty gritty appraisal of the impacts of ocean level climb on beachfront situations and showing a portion of the difficulties that need to be tended to adjust to ocean level ascent while ensuring ecological assets and supporting financial development.

Variables Affecting Airport Weather Delay and the Impact of Climate Change (2009)

This paper assesses the effect of changing climate on air transport operations over the advancing 50 years, utilizing a careful investigation of London's Heathrow air terminal.

Overwhelmed Bus Barns and Buckled Rails: Public Transportation and Climate Change Adaptation

This report looks at anticipated atmosphere affects on U.s. travel, environmental change adjustment exertions by household and outside travel organizations, travel adjustment methods, hazard administration devices, and joining of adjustment into travel organization authoritative structures and procedures.

Manufactured surfaces build vitality request and hotness island impacts, unfavorably effect air quality, and produce nursery gasses that help an unnatural weather change. This paper shows a strategy to gauge surface sorts in the manufactured environment and their effects on high temperature island impacts.

Worldwide Climate Change and Transportation: Coming to Terms (2001)

Transportation Research Board

This set of readings meant to manufacture expanded proficient understanding among state Dots and other transportation associations of the worldwide environmental change issues and their suggestions for transportation choices. The ENO Transportation Foundation authorized presentations of paramount parts of worldwide environmental change and their potential ramifications for the country's transportation framework.

Worldwide Climate Change Impacts in the United States (2009)

Effects of Climate Change and Variability on Transportation Systems and Infrastructure: The Gulf Coast Study

To better comprehend potential environmental change affects on transportation base and recognize adjustment techniques, the U.s. Branch of Transportation (U.s. Speck) is directing a complete, multi-stage investigation of environmental change affects in the Central Gulf Coast area. This district is home to a complex multimodal system of transportation framework and a few expansive populace focuses, and it plays a basic national financial part in the import and fare of oil and gas, horticultural items, and different merchandise. The study is supported by the U.s. Speck's Center for Climate Change and Environmental Forecasting in association with the U.s. Topographical Survey (USGS) and is overseen by FHWA.

Effects of Climate Change and Variability on Transportation Systems and Infrastructure: Gulf Coast Study (2008) (PDF 10.06mb)

U.s. Environmental Change Science Program

This multi-year examination system examined how short and long haul changes in atmosphere could influence transportation frameworks in the U.s. focal Gulf Coast area and how transportation chiefs could address conceivable effects. Included in the investigation are the influences to streets, airplane terminals, rail, travel frameworks, and ports.

Effects of Flooding and Climate Change on Urban Transportation: A System Wide Performance Assessment of the Boston Metro Area (2005)

(article accessible for buy from

Diary: Transportation Research Part D: Transport and Environment

This paper evaluates the potential effect of environmental change on the framework wide execution of transportation systems utilizing the Boston Metro Area as a careful investigation. The approach incorporates anticipated changes in area use, demographic and climatic conditions into the urban transportation displaying framework keeping in mind the end goal to investigate the relative effects of an Earth-wide temperature boost on the framework execution because of extra riverine and seaside flooding.

Multiagent Simulation in Transport: Impacts of Co2 Emission Trading Scheme in German Transport (2009)

This article plans to demonstrate that behavioral multi-executor models are a suitable methodology for surveying the effect of arrangement instruments to diminish Co2 outflows in street transport by presenting a multi operator model for the German street transport segment. A speculative Co2 discharge exchanging plan with an open and a shut option is connected to a Java-based recreated transport part. The impacts on endorsement costs and fuel interest are ascertained as for the individual response capacities of family units and transporters.

Getting ready for Climate Change Impacts at U.S. Ports (2009)

Transportation Research Board

U.S. ports need to better comprehend environmental change and how it may affect them. Over the nearing decades, ports are liable to encounter higher ocean levels and storm surges because of environmental change, and additionally other immediate and roundabout effects. Most ports don't have all the earmarks of being pondering, left be earnestly get ready to address, the impacts of environmental change.

Wednesday, 24 July 2013

Earth’s average surface temperature

Global Warming is the rise of Earth’s average surface temperature due to result of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise get off from Earth. This is a type of green house effect. Since the early 20th century, Earth’s mean surface temperature has risen by about 0.8 °C (1.4 °F), with just about two-thirds of the increase happening since 1980. 

It's supposed that by the time a baby born today is 80 years old, the world will be 6 and a half degrees moderately hot than it is at the present.

Friday, 22 February 2013


While there is still some disagreement about global warming, many scientists believe it is the result of changes in the earth’s atmosphere. The atmosphere creates a blanket that surrounds the earth. Sunlight passes through the greenhouse gases in the atmosphere to reach the earth’s surface and is absorbed. Once this energy is absorbed it goes through various natural processes, such as photosynthesis, and is re-released back into the atmosphere.

Some of the energy escapes the atmosphere, but a considerable amount becomes trapped by the greenhouse gases and causes the earth to warm in temperature. This is known as the greenhouse effect. The greenhouse effect is naturally occurring and vital to our survival. Without it earth would not be warm enough to sustain life. However, many scientists believe the growth of industry and urbanization has had a direct impact on the earth’s atmosphere, resulting in an unhealthy build up greenhouse gases. The general consensus about global warming points in one direction and it seems that evidence of the serious challenge it presents can be directly attributed to human activity.

Carbon dioxide, the gas released during the burning of fossil fuels, such as coal, oil and natural gas heads the list of emissions that are damaging the atmosphere. This is followed by methane, which is released primarily from landfills, mining operations and gas pipelines, chlorofluorocarbons, which have also been found to contribute to ozone depletion, and nitrous oxide, that comes from fertilizers and other chemicals.

Thursday, 2 August 2012

China Olympics Traffic Measures Cut Carbon Emissions

A new NASA-funded study of the impacts of China's traffic restrictions for the 2008 Summer Olympics in Beijing shows how widespread changes in transportation patterns could greatly reduce the threat of climate change.

New research by an international team of scientists led by the National Center for Atmospheric Research (NCAR), Boulder, Colo., indicates that China's restrictions on motor vehicles designed to improve air quality during the games had the side benefit of dramatically cutting emissions of carbon dioxide by between 26,500 and 106,000 U.S. tons (24,000 and 96,000 metric tons) during the event.

To put this in perspective, the authors note that this reduction by a single city represents more than one-quarter of one percent of the emissions cut that would be necessary worldwide, on a sustained basis, to prevent the planet from heating up by more than about 3.6 degrees Fahrenheit (2 degrees Celsius) by the end of this century. That is the amount of heating generally considered to lead to major societal impacts.

While scientists have long known that reduced traffic would lead to lower carbon-dioxide emissions, precise estimates for an actual urban area are difficult to calculate. "The Beijing Olympics allowed us to actually measure what happens when people drive much less, and it turns out that it makes quite a substantial difference to our climate," says NCAR scientist Helen Worden, the lead author. "People may think their choice of how to commute to work doesn't make a difference, whether driving their cars or riding their bikes. But on a large scale, it really does."

Recent research has confirmed that China's traffic restrictions successfully reduced levels of air pollutants such as carbon monoxide and ozone. Worden and her colleagues, using new methods in satellite observations and computer simulations, were also able to estimate the impact on carbon dioxide, a powerful greenhouse gas. Data from the NCAR/University of Toronto Measurements of Pollution in the Troposphere (MOPITT) instrument aboard NASA's Terra satellite were used to obtain the carbon monoxide estimates utilized to infer the carbon dioxide emissions.

Worden adds that the same study could not be done for this summer's London Olympics, partly because the surface and cloud conditions in London aren't as favorable for the measurements of carbon monoxide near the surface from MOPITT. In addition, London is very different from Beijing in terms of pollution controls, and it has already restricted traffic in the central city for several years.

Funded primarily by NASA, the study was published in Geophysical Research Letters, a publication of the American Geophysical Union. It was co-authored by researchers at the University of Iowa, Iowa City; the University of Tsinghua in Beijing; Argonne National Laboratory, Lemont, Ill.; and NASA's Jet Propulsion Laboratory, Pasadena, Calif. NCAR is sponsored by the National Science Foundation.

Wednesday, 13 June 2012

Storm sentinels

Beginning this summer and over the next several years, NASA will be sending unmanned aircraft dubbed "severe storm sentinels" above stormy skies to help researchers and forecasters uncover information about hurricane formation and intensity changes.

Several NASA centers are joining federal and university partners in the Hurricane and Severe Storm Sentinel (HS3) airborne mission targeted to investigate the processes that underlie hurricane formation and intensity change in the Atlantic Ocean basin.

NASA's unmanned sentinels are autonomously flown. The NASA Global Hawk is well-suited for hurricane investigations because it can over-fly hurricanes at altitudes greater than 60,000 feet with flight durations of up to 28 hours - something piloted aircraft would find nearly impossible to do. Global Hawks were used in the agency's 2010 Genesis and Rapid Intensification Processes (GRIP) hurricane mission and the Global Hawk Pacific (GloPac) environmental science mission.

"Hurricane intensity can be very hard to predict because of an insufficient understanding of how clouds and wind patterns within a storm interact with the storm’s environment. HS3 seeks to improve our understanding of these processes by taking advantage of the surveillance capabilities of the Global Hawk along with measurements from a suite of advanced instruments," said Scott Braun, HS3 mission principal investigator and research meteorologist at NASA's Goddard Space Flight Center in Greenbelt, Md.

HS3 will use two Global Hawk aircraft and six different instruments this summer, flying from a base of operations at Wallops Flight Facility in Virginia.

"One aircraft will sample the environment of storms while the other will measure eyewall and rainband winds and precipitation," Braun said. HS3 will examine the large-scale environment that tropical storms form in and move through and how that environment affects the inner workings of the storms.

HS3 will address the controversial role of the hot, dry, and dusty Saharan Air Layer in tropical storm formation and intensification. Past studies have suggested that the Saharan Air Layer can both favor or suppress intensification. In addition, HS3 will examine the extent to which deep convection in the inner-core region of storms is a key driver of intensity change or just a response to storms finding favorable sources of energy.

The HS3 mission will operate during portions of the Atlantic hurricane seasons, which run from June 1 to November 30. The 2012 mission will run from late August through early October.

The instruments to be mounted in the Global Hawk aircraft that will examine the environment of the storms include the scanning High-resolution Interferometer Sounder (S-HIS), the Advanced Vertical Atmospheric Profiling System (AVAPS) also known as dropsondes, and the Cloud Physics Lidar (CPL). The Tropospheric Wind Lidar Technology Experiment (TWiLiTE) Doppler wind lidar will likely fly in the 2013 mission.

Another set of instruments will fly on the Global Hawk focusing on the inner region of the storms. Those instruments include the High-Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP) conically scanning Doppler radar, the Hurricane Imaging Radiometer (HIRAD) multi-frequency interferometric radiometer, and the High-Altitude Monolithic Microwave Integrated Circuit Sounding Radiometer (HAMSR) microwave sounder. Most of these instruments represent advanced technology developed by NASA, that in some cases are precursors to future satellite sensors.

NASA's Science Mission Directorate Global Hawk aircraft will deploy to Wallops Flight Facility from their home base at NASA's Dryden Flight Research Center on Edwards Air Force Base, Calif.

NASA's Global Hawk soars aloft from Edwards Air Force Base, Calif. The NASA Global Hawk is well-suited for hurricane investigations because it can over-fly hurricanes at altitudes greater than 60,000 feet with flight durations of up to 28 hours — something piloted aircraft would find nearly impossible to do. Credit: NASA/Tony Landis
"HS3 marks the first time that NASA's Global Hawks will deploy away from Dryden for a mission, potentially marking the beginning of an era in which they are operated regularly from Wallops," said Paul Newman, atmospheric scientist at NASA Goddard and deputy principal investigator on the HS3 mission.

NASA's Science Mission Directorate in Washington is establishing a Global Hawk operations center for science operations from Wallops. "With the Global Hawks at NASA Dryden in California, NASA Wallops will become the 'Global Hawk - Eastern' science center," Newman said.

From rockets studying the upper atmosphere to unmanned aircraft flying over hurricanes, NASA's Wallops Flight Facility is fast becoming a busy place for science. Wallops is one of several NASA centers involved with the HS3 mission. Others include Goddard, Dryden, Ames Research Center, Marshall Space Flight Center, and the Jet Propulsion Laboratory.

The HS3 mission is funded by NASA Headquarters and managed by NASA's Earth System Science Pathfinder Program at NASA's Langley Research Center, Hampton, Va. The HS3 mission also involves collaborations with various partners including the National Centers for Environmental Prediction, Naval Postgraduate School, Naval Research Laboratory, NOAA's Hurricane Research Division and Earth System Research Laboratory, Northrop Grumman Space Technology, National Center for Atmospheric Research, State University of New York at Albany, University of Maryland - Baltimore County, University of Wisconsin, and University of Utah.

NASA's new carbon-counting instrument leaves the nest

Its construction now complete, the science instrument that is the heart of NASA's Orbiting Carbon Observatory-2 (OCO-2) spacecraft — NASA's first mission dedicated to studying atmospheric carbon dioxide — has left its nest at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and has arrived at its integration and test site in Gilbert, Ariz.

A truck carrying the OCO-2 instrument left JPL before dawn on Tuesday, May 9, to begin the trek to Orbital Science Corporation's Satellite Manufacturing Facility in Gilbert, southeast of Phoenix, where it arrived that afternoon. The instrument will be unpacked, inspected and tested. Later this month, it will be integrated with the Orbital-built OCO-2 spacecraft bus, which arrived in Gilbert on April 30.

Once technicians ensure the spacecraft is clean of any contaminants, the observatory's integration and test campaign will kick off. That campaign will be conducted in two parts, with the first part scheduled for completion in October. The observatory will then be stored in Gilbert for about nine months while the launch vehicle is prepared. The integration and test campaign will then resume, with completion scheduled for spring 2014. OCO-2 will then be shipped to Vandenberg Air Force Base, Calif., in preparation for a launch as early as the summer of 2014.

Technicians load the OCO-2 instrument and its ground support equipment aboard a moving van at JPL in preparation for its trek to Orbital Science Corporation's Satellite Manufacturing Facility in Gilbert, Ariz. Credit: NASA/JPL-Caltech.
"The OCO-2 instrument looks great, and its delivery to Orbital's Gilbert, Ariz., facility is a big step forward in successfully launching and operating the mission in space," said Ralph Basilio, OCO-2 project manager at JPL.

OCO-2 is the latest mission in NASA's study of the global carbon cycle. Carbon dioxide is the most significant human-produced greenhouse gas and the principal human-produced driver of climate change. The original OCO mission was lost shortly after launch on Feb. 24, 2009, when the Taurus XL launch vehicle carrying it malfunctioned and failed to reach orbit.

The experimental OCO-2 mission, which is part of NASA's Earth System Science Pathfinder Program, will uniformly sample the atmosphere above Earth's land and ocean, collecting more than half a million measurements of carbon dioxide concentration over Earth's sunlit hemisphere every day for at least two years. It will do so with the accuracy, resolution and coverage needed to provide the first complete picture of the regional-scale geographic distribution and seasonal variations of both human and natural sources of carbon dioxide emissions and their sinks-the places where carbon dioxide is removed from the atmosphere and stored.

Scientists will use OCO-2 mission data to improve global carbon cycle models, better characterize the processes responsible for adding and removing carbon dioxide from the atmosphere, and make more accurate predictions of global climate change.

The mission provides a key new measurement that can be combined with other ground and aircraft measurements and satellite data to answer important questions about the processes that regulate atmospheric carbon dioxide and its role in the carbon cycle and climate. This information could help policymakers and business leaders make better decisions to ensure climate stability and retain our quality of life. The mission will also serve as a pathfinder for future long-term satellite missions to monitor carbon dioxide.

Each of the OCO-2 instrument's three high-resolution spectrometers spreads reflected sunlight into its various colors like a prism, focusing on a different, narrow color range to detect light with the specific colors absorbed by carbon dioxide and molecular oxygen. The amount of light absorbed at these specific colors is proportional to the concentration of carbon dioxide in the atmosphere. Scientists will use these data in computer models to quantify global carbon dioxide sources and sinks.

For more information on the mission, visit: the JPL and NASA OCO-2 websites.

Mild fire forecast

Forests in the Amazon Basin are expected to be less vulnerable to wildfires this year, according to the first forecast from a new fire severity model developed by university and NASA researchers.

Fire season across most of the Amazon rain forest typically begins in May, peaks in September and ends in January. The new model, which forecasts the fire season’s severity from three to nine months in advance, calls for an average or below-average fire season this year within 10 regions spanning three countries: Bolivia, Brazil and Peru.

“Tests of the model suggested that predictions should be possible before fire activity begins in earnest,” said Doug Morton, a co-investigator on the project at NASA’s Goddard Space Flight Center in Greenbelt, Md. “This is the first year to stand behind the model and make an experimental forecast, taking a step from the scientific arena to share this information with forest managers, policy makers, and the public alike.”

Gauges convey the fire severity forecast for 10 regions in the Amazon Basin where fire activity varies greatly from year to year, and where climate conditions have a significant impact on fire activity. Credit: Yang Chen/UC Irvine
The model was first described last year in the journal Science. Comparing nine years of fire data from NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite, with a record of sea surface temperatures from NOAA, scientists established a connection between sea surface temperatures in the Pacific and Atlantic oceans and fire activity in South America.

“There will be fires in the Amazon Basin, but our model predictions suggest that they won’t be as likely in 2012 as in some previous years,” said Jim Randerson of the University of California, Irvine, and principal investigator on the research project.

Specifically, sea surface temperatures in the Central Pacific and North Atlantic are currently cooler than normal. Cool sea surface temperatures change patterns of atmospheric circulation and increase rainfall across the southern Amazon in the months leading up to the fire season.

“We believe the precipitation pattern during the end of the wet season is very important because this is when soils are replenished with water,” said Yang Chen of UC Irvine. “If sea surface temperatures are higher, there is reduced precipitation across most of the region, leaving soils with less water to start the dry season.”

Without sufficient water to be transported from the soil to the atmosphere by trees, humidity decreases and vegetation is more likely to burn. Such was the case in 2010, when above-average sea surface temperatures and drought led to a severe fire season. In 2011, conditions shifted and cooler sea surface temperatures and sufficient rainfall resulted in fewer fires, similar to the forecast for 2012.

Improvements to the model are possible by incorporating data from the MODIS instrument on NASA's Aqua satellite, accounting for fires that occur in the afternoon when conditions are hotter and drier. Credit: Doug Morton.
Building on previous research, the researchers said there is potential to adapt and apply the model to other locations where large-scale climate conditions are a good indicator of the impending fire season, such as Indonesia and the United States.

Amazon forests, however, are particularly relevant because of their high biodiversity and vulnerability to fires. Amazon forests also store large amounts of carbon, and deforestation and wildfires release that carbon back to the atmosphere. Predictions of fire season severity may aid initiatives – such as the United Nation’s Reducing Emissions from Deforestation and forest Degradation program – to reduce the emissions of greenhouse gases from fires in tropical forests.

“The hope is that our experimental fire forecasting information will be useful to a broad range of communities to better understand the science, how these forests burn, and what predisposes forests to burning in some years and not others,” Morton said. “We now have the capability to make predictions, and the interest to share this information with groups who can factor it into their preparation for high fire seasons and management of the associated risks to forests and human health.”


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