Environmental Issues > Global Warming Main Page > All Global Warming Documents

Antarctic Ice Shelf Collapses
National Snow and Ice Data Center
Satellite Spies on Doomed Antarctic Ice Shelf
British Antarctic Survey
(March 2002)

Scientists say the dramatic disintegration of a Rhode Island-sized ice chunk off the Antarctic Peninsula earlier this year is most likely the result of global warming. "With the disappearance of ice shelves that have existed for thousands of years, you rather rapidly run out of other explanations," Dr. Theodore A. Scambos, a glaciologist at the National Snow and Ice Data Center, told The New York Times after the Larsen B shelf collapsed. ("Large Ice Shelf in Antarctica Disintegrates at Great Speed," March 20, 2002.) Scambos and other researchers said it was the first time in thousands of years that the east coast of Antarctica had seen such sharp rises in temperature and dramatic ice loss. Over the last 50 years, average temperatures in the Antarctica Peninsula have risen by 4.5 degrees Fahrenheit (2.5 degrees Celsius), four times the global average. The unprecedented warming has led to a pattern of ice shelve loss on the eastern side of the Peninsula not seen in 12,000 years, researchers said. Scientists said they were also shocked by the speed with which the Larsen B shelf disintegrated -- 1,200 square miles (3,000 square kilometers) in 35 days.


Other recent studies found cooling in central Antarctica, including a January 13, 2002 report in Nature (Peter T. Doran) and the January 18, 2002 issue of Science Magazine (Slawek Tulaczyk). Critics have used these studies to claim global warming is not taking place. However, the authors of the Science and Nature studies reject such claims. Variations in temperature will exist across any large landmass. The researchers add that their data shows only that the effects of global warming on Antarctica may prove harder to forecast than anticipated. Doran told the San Francisco Chronicle that, contrary to the insinuations, "global warming is real and happening right now." ("Media Goofed on Antarctic Data," February 4, 2002.)


Climate of 2001 - Annual Review
National Climate Data Center
WMO Statement on the Status of the Global Climate in 2001
World Meteorological Organization
(December 2001)

Both these scientific bodies found earth's temperature for 2001 to be the second hottest on record. In addition, nine of the 10 warmest years since measurements were first kept in 1860 have occurred since 1990, according to the World Meteorological Organization (WMO). The WMO also found that temperatures are currently rising three times as fast as in the early 20th century. The agency attributed much of the warming to heat-trapping gases like carbon dioxide caused by the burning of fossil fuels. "There are skeptics on everything, but certainly the evidence we have today shows we do have global warming, and that most of this is due to human action," Ken Davidson, the director of the WMO's climate program told The New York Times after the release of the report. The hottest year on record, according to the organizations, was 1998, when average global temperatures were 58.1 degrees Fahrenheit. Average temperature for 2001 was 57.8 degrees, according to the National Climatic Data Center.


Climate Change Science: An Analysis of Some Key Questions
National Academy of Sciences
(June 2001)

This report was requested by President Bush to determine whether mankind's actions were causing global warming. The answer was a resounding 'yes.' The blue ribbon panel found that "greenhouse gases are accumulating in earth's atmosphere as a result of human activities, causing surface air temperatures and subsurface ocean temperatures to rise." "Temperatures are, in fact, rising," the report adds. The unanimous 11-member panel, which included previous skeptics about global warming, said increasing temperatures posed a problem to humans and ecosystems around the globe. They also said the problem was getting worse. In addition, the panel stated scientific confidence was "higher today than it was 10 or even 5 years ago" that increased greenhouse gas concentrations were to blame for earth's one degree temperature increase over the last 50 years. Human-induced warming and associated sea level rise are expected to continue through the 21st century, the group said, and national policy decisions made now will influence the extent of the damage suffered by humans and ecosystems later in this century.


Climate Change 2001: The Scientific Basis
Climate Change 2001: Impacts, Adaptation and Vulnerability
Intergovernmental Panel on Climate Change
(January and February 2001)

This United Nations-sanctioned panel of hundreds of scientists released two landmark reports on climate change at the beginning of 2001. The first, known as the Working Group I Report on the scientific basis of climate change, states unequivocally that pollution (mainly from the burning of fossil fuels) causes climate change. "Emissions of greenhouse gases...due to human activities continue to alter the atmosphere in ways that are expected to affect the climate," the study says. Global warming has caused sea levels to rise, ocean heat content to increase, and snow cover and ice extent to decrease, according to the study. This and other evidence led the panel to conclude that "there is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities." The report also predicts that earth's average temperature could rise by 3 to 10 degrees Fahrenheit over the next 100 years. That increase would mark the most rapid change in 10 millennia. It would also be as much as 60 percent higher than the IPCC predicted less than six years ago. The study found that warming in the 20th century was most likely the greatest of the last 1,000 years, and that the 1990s was the hottest decade of the last millennium.

The second report, "Climate Change 2001: Impacts, Adaptation and Vulnerability," is the most comprehensive look yet at the existing and long-term effects of global warming. It predicts that rising temperatures caused by the burning of fossil fuels could cause large-scale and irreversible climate changes. Those changes include altered ocean currents, slowed circulation of warm water in the North Atlantic and a vast reduction of mountain glaciers and the Greenland ice sheet. The study also warns of savage floods, disrupted water supplies, droughts, violent storms and the spread of cholera and malaria as temperatures rise over the next century. Poor countries, particularly those in Latin America, Africa and Asia would bear most of the burden of extreme climate changes, which would further widen the gap between poor nations and rich ones, the report concludes. "Most of earth's people will be on the losing side," IPCC Co-Chair and Harvard environmental scientist James McCarthy said of the study's findings.


Climate Change Impacts on the United States
National Assessment Synthesis Team
(December 2000)

This study, ordered by Congress in 1990, offers the first comprehensive assessment of how human-induced global warming will affect the United States. The forecast is gloomy. "Increasingly, there will be significant climate-related changes that will effect each one of us," the study states. According to the report, if we don't curb our emissions of heat-trapping gases like carbon dioxide, temperatures will rise between 5 and 10 degrees Fahrenheit over the next century. That increase will cause, for example, alpine meadows in the Rocky Mountains to disappear, sugar maple trees to vanish in the Northeast, and greater risk from storm surges in the Southeast. Rising temperatures will also exacerbate water shortages (especially in the West) and cause New York City to steam in the summer like Atlanta does now. Other likely impacts: coastal erosion, destructive storm surges and the disappearance of barrier islands, all due to rising sea levels.


Climate Extremes: Observations Modeling and Impacts
Science v. 289: 2068-2074
(September 2000)

Extreme weather events such as droughts, floods, heat waves and heavy rainfall are expected to increase over the next 100 years, according to a team of scientists from the National Climatic Data Center. Lead author David Easterling notes that these changes will continue to increase with the rise of "ever greater amounts of GHGs in the atmosphere." Easterling and his colleagues reached their conclusion after reviewing hundreds of studies that used data and climate models to examine past and future changes in climate extremes. The report found that such extreme events will cause sharply increased financial losses in the United States and are likely to lead to the extinction of more plant and animal species.


Causes of Climate Change Over the Past 1,000 Years
Science v. 289:270-277
(July 2000)

Humans are the dominant force behind the sharp global warming trend seen in the 20th century, according to this analysis of the climate over the last 1,000 years. The report found that natural factors like volcanic eruptions and fluctuations in sunshine, which were powerful influences on temperatures in past centuries, can account for only 25 percent of the warming since 1900. The rest of the warming was caused by human activity, particularly rising levels of carbon dioxide and other heat-trapping gases, according to the study's author, Texas A&M geologist Thomas J. Crowley. Crowley notes that "natural variability plays only a subsidiary role in the 20th century warming and that the most parsimonious explanation for most of the warming is that it is due to the anthropogenic increase in greenhouse gases" (GHGs). The study presents the most direct link to date between people and the 1.1 degree Fahrenheit rise in average global temperatures over the last 100 years.



Studies By Year:  [Intro]  [2008]  [2007]  [2006]  [2005]  [2004]  [2003]  [2000 to 2002]
All Tags [ View Popular Tags ]:
AB 1493
AB 32
ACES
agriculture
air pollution
air quality
Alaska
algae
Arctic
Arctic National Wildlife Refuge
asthma
automakers
biodiesel
biofuels
cabon
California
cap 2.0
cap and trade
carbon assessment
carbon capture and storage
carbon dioxide
carbon emissions
carbon footprint
carbon offsets
carbon pollution
carbon standard
caribou
cars
causes of global warming
CCS
Chile
china
Clean air
Clean Air Act
clean energy
clean energy economy
climate
Climate Action Plan
climate change
climate disruption
climate disruption tax
climate legislation
Climate Security Act
coal
coal plants
coal-fired power plants
coastal flooding
consequences
coral
DanLashof
dirty fuels
drilling
drought
earth day
economy
Elizabeth Kolbert
emissions
endangered species
endangered species protection
energy
energy efficiency
energy efficient buildings
energy policy
energy security
environmental protection agency
EPA
extreme weather
farming
fish & fishing
flooding
floods
florida
food
Forests
fuel
fuel efficiency standards
fuel savings
Gary Braasch
gas prices
global warming and health
global warming and the economy
global warming emissions
global warming emissions copenhagen accord
global warming legislation
global warming treaties
Great Lakes
Great Lakes National Parks
green buildings
green jobs
green sports
greenhouse gas
greenhouse gas emissions
greenhouse gas regulations
greenhouse gases
grizzly bear
growing green awards
habitat loss
Harmful Algal Blooms
health
health effects
health effects of pollution
health impacts
heat
heat wave
heat waves
holiday
hurricane
hurricane Irene
Hurricane Katrina
Hurricane Sandy
hurricanes
hybrid
hybrid vehicles
India
India Initiative
infrastructure
Intergovernmental Panel on Climate Change
International
international agreements
interviews
IPCC
KellyHenderson
KimKnowlton
Kyoto protocol
Latin America
LCFS
legislation
liquid coal
livestock
marine conservation
Massachussetts v EPA
mccain leiberman
mccain-leiberman bill
McKinsey
melting ice and glaciers
Mexico
MiriamRotkin-Ellman
Montreal Protocol
mortality
mountain pine beetle
mountaintop removal mining
national parks
natural gas
new energy economy
nuclear energy
ocean acidification
ocean policy
ocean pollution
oil
oil shale
oil shale development
oil shale development in colorado river basin
oil shale impact on water
ozone
PeteAltman
photos
polar bears
polar ice cap
policy
pollution
power plants
public transportation
record-high temperatures
refrigerants
renewable energy
renewable energy/clean energy
renewables
respiratory illness
Rocky Mountains
salmon
Sandy
sb375
science
sea levels
sea-level rise
ski
smart growth
smog air pollution
solar power
solutions
species protection
sprawl
storms
Supreme Court
sustainable communities
tar sands
tennessee
testimony
tourism
toxic waste
transportation
transportation bill
trout
U.S.
VEETC
vehicle emissions
vehicles
water
water supply
water sustainability
weather
Western Arctic
what you can do
white bark pine
whitebark pine
Wilderness Preservation
wildfires
wildlife
winter sports
Yellowstone

Sign up for NRDC's online newsletter

See the latest issue >

This Is Global Warming

YouTube Video
Watch the Video »

Our new video shows the effects of global warming in the world today.

Give the Gift That Will Make a Difference: Clean Energy Boost

NRDC Gets Top Ratings from the Charity Watchdogs

Charity Navigator awards NRDC its 4-star top rating.
Worth magazine named NRDC one of America's 100 best charities.
NRDC meets the highest standards of the Wise Giving Alliance of the Better Business Bureau.


Donate now >

Share | |
Find NRDC on
YouTube