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This page brings together news releases and background material about past
field experiments and provides updates on some of the findings emerging from
them. For field projects about to get under way, see Upcoming
Field Experiments.
The atmosphere and other components of the Earth system know no boundaries. Field projects reflect that global nature, as well as the complexity of the scientific puzzles to be solved.
Major field campaigns may deploy dozens to hundreds of researchers from a wide spectrum of academic disciplines. These experiements draw on the resources and personnel of many national and international institutions, deploying a host of sensors to bring back large quantities of data.
Some results emerge quickly, while others take years of analysis to uncover.
Search for a project or key word(s) using your computer's built-in "find" function,
or browse by topic.
Browse by Topic
Air pollution (including carbon dioxide):
ACE-Asia | ACME | INDOEX |
MIRAGE | MOPITT | PACDEX
North American Monsoon:
NAME
Ozone production and loss (including ozone holes):
HIRDLS | SOLVE (SAGE III) | TOPSE
Remote sensing from space:
COSMIC | HIRDLS | MOPITT |
Sunrise Solar Telescope
Storms, clouds, and rain:
BAMEX | IHOP2002 | RAINEX |
REFRACTT | RICO | STEPS
Turbulence:
T-REX
Weather, climate, space weather observations:
COSMIC | Sunrise Solar Telescope
Air pollution
ACE-Asia (begun March 2001)
The fourth in a series of Aerosol Characterization Experiments, ACE-Asia was designed to improve understanding of the effects on Earth's climate of atmospheric aerosol particles. Some 130 scientists from nine countries gathered in and near the western Pacific Ocean, deploying ships, satellites, aircraft, and ground-based instruments to probe massive dust plumes from the Asian desert as they collided with heavy industrial pollution. Early results show differences between aerosols from North America and those found in Asia; the analysis is improving the ability of computer models to represent the location and effect of Asian aerosols on Earth's temperature.
Updates
Aerosol Characterization of Asian Dust Storms and Pollution Plumes—USGCRP 2002 Accomplishments (October 12, 2003)
Asian Pollution Cloud Changing Climate, Study Says—National Geographic News (February 10, 2003)
Field campaign
Scientists, Ships, Aircraft to Profile Asian Pollution and Dust (March 20, 2001) ACE-Asia home page

ACME (begun April 2004)
Accurate assessments of carbon uptake over complex terrain could help show to what extent carbon dioxide storage in Western mountain forests—a potentially important "sink" for the greenhouse gas—may be slowing down as the ongoing drought affects tree growth. For the field phase of the Airborne Carbon in the Mountains Experiment, scientists flew the NSF/NCAR C-130 research aircraft over Colorado's Front Range to measure how much carbon dioxide mountain forests remove from the air as spring turns into summer.
Updates
ACME research presentations (March 2005)
Sharing
Our World's Air—UCAR Highlights
2005
Field campaign
ACME campaign photos
NCAR Aircraft, Ground Instruments to Track Carbon Dioxide Uptake along Colorado's Drought-Plagued Front Range (April 26, 2004)
ACME home page

INDOEX (begun March 1999)
During the Indian Ocean Experiment, an international team of over 200 scientists tracked and sampled polluting aerosols at the intersection over the tropical Indian Ocean of air masses from the relatively uninhabited southern Indian Ocean and Antarctica and from the heavily populated Indian subcontinent. Goals included understanding how the cooling of aerosols counteracts warming due to greenhouse gases. INDOEX revealed that local pollution travels farther and persists longer than had previously been suspected. This South Asian haze, also called the Atmospheric Brown Cloud or the Asian Brown Cloud, which lingers during the dry season from December to April, made international headlines in the summer of 2002.
Updates
Pollution Cloud Over South Asia Threatens Economies—National Geographic News (August 12, 2002)
Tiny Particles Of Pollution May Carry Large Consequences For Earth's Water Supply—ScienceDaily.com (December 10, 2001)
NCAR Model Yields Best Global Picture to Date of Climate-Modifying Aerosols (April 13, 2001)
INDOEX finds surprisingly dirty air (Summer 1999)
Field campaign
NCAR Scientists, Aircraft, Instruments Head to Indian Ocean for Climate Change Experiment; UCAR Directs Operations (March 4, 1999)
INDOEX home page

MIRAGE (begun March 2006)
In one of the most complex field campaigns ever undertaken in
atmospheric chemistry, an international team made multiple research
flights in the NSF/NCAR C-130 and other aircraft and operated ground
instruments to investigate the chemical and physical transformation
of air pollution as it flows downwind from Mexico City. The goal
is to assess the pollution's impact on regional
and global air quality, climate, and ecosystems. The results are expected to be
applicable to megacities (cities with 10 million or more inhabitants)
in other locations around the world. Updates
Notes
from the field: Turbulence and pollution
(May 2006)
Field campaign NCAR Annual Report—Megacity Impacts on Regional and Global Environments (MIRAGE) (2006)
Researchers to Scrutinize
Megacity Pollution During Mexico City Field Campaign (March
2, 2006)
Field
Research Report: The MIRAGE Project (Spring 2006) Researchers to study air pollution near Mexico City
(June 2005)
MIRAGE home page

MOPITT (launched aboard NASA's Terra satellite December 18, 1999)
A space-based instrument dedicated to Measurements of Pollution in the Troposphere has been orbiting Earth since late 1999. MOPITT makes global observations of carbon monoxide, a pollutant in its own right and a tracer for tracking other harmful ingredients in the lower atmosphere. The instrument has opened a window on the chemical complexity and dynamic variability of the lower atmosphere, where weather evolves and humans routinely disturb the environment.
Updates
Sharing
Our World's Air—UCAR Highlights
2005
NCAR Analysis Shows Widespread Pollution from 2004 Wildfires (June 29, 2005)
New Images from Space Spotlight Asian, Australian Pollution (February 4, 2003)
Global Pollution Hot Spots Identified (December 6, 2002)
Scientists Monitor Global Air Pollution from Space (May 30, 2001)
MOPITT image gallery (NASA Visible Earth)
Launch
New Satellite-Borne Instrument to Measure Carbon Monoxide Pollution in the Lower Atmosphere (December 19, 1999)

PACDEX (begun
April 2007)
The Pacific Dust Experiment studied
the massive plumes of dust and pollutants that are blown from Asia
to North America and how these plumes may affect
- the formation of clouds and the development of precipitation
- the intensity of storms moving across the Pacific
- the amount of sunlight that reaches Earth
- the extent to which greenhouse gases will warm the Pacific
basin as well as the entire globe in the next few decades
Field campaign
Scientists to Track Impact
of Asian Dust and Pollution on Clouds, Weather, Climate Change (April
18, 2007)
Scientists Chat with
Journalists - ArchivePACDEX (May 15, 2007)
PACDEX Multimedia
Gallery
PACDEX Fact Sheet
PACDEX Home Page
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North American Monsoon
NAME (begun July 2004)
To launch the North American Monsoon Experiment, U.S. and Mexican researchers probed moisture-laden skies from Mazatlán to Tucson during the largest study yet of this important weather phenomenon. Each year the midsummer arrival of quenching rains plays a vital role in dryland farming, ranching, and wildfire control across the southwest United States and northwest Mexico. The monsoon may also hold useful clues for predicting summer rainfall elsewhere in the United States.
Updates
NAME 2004 Data Analysis and Science Working Group Meeting (March 9-11, 2005)
Field campaign
Monsoons, North American Style: NCAR Helps Probe the Southwest's Summer Rains (July 29, 2004)
NAME home page back to top
Ozone production and loss in the stratosphere (including ozone holes)
HIRDLS (launched aboard NASA's Aura satellite on July 15, 2004)
The High Resolution Dynamics Limb Sounder is a space-based instrument that provides a detailed picture of chemistry from the upper troposphere to well above the stratosphere. By measuring atmospheric chemicals and temperatures in unprecedented detail, HIRDLS advances scientific insights on critical issues such as ozone loss and the impact of greenhouse gases on climate.
Updates
HIRDLS comes through (November 2005)
Launch
New Space-borne Instrument to Track Greenhouse Gases, Ozone Destroyers, and Other Pollutants (July 7, 2004)
HIRDLS home page

SOLVE (SAGE III Ozone Loss and Validation Experiment) (begun January 2000)
SOLVE is an international project to measure levels of ozone and learn more about its life cycle in the upper atmosphere of the Arctic. During the first SOLVE mission, winter measurements were made using aircraft, balloon platforms, and ground-based instruments. The project also gathered data to validate the SAGE III instrument being built to gather ozone data from space.
Updates
Atmospheric
Composition: USGCRP Fiscal Year 2002 Accomplishments—US
Global Change Research Program (September 3, 2004)
Journal of Geophysical Research, Vol. 107,
No. D20, 2002, Special Section: Ozone
loss from quasi-conservative coordinate mapping during the 1999-2000
SOLVE/THESEO 2000 campaigns
Field campaign
NCAR Scientists Seek Ozone-Hole Clues During Largest Campaign Ever in Arctic Stratosphere (January 14, 2000)
SOLVE II home page
SOLVE I home page

TOPSE (begun April 2000)
During the field expedition for Tropospheric Ozone Production about the Spring Equinox (TOPSE), scientists measured an array of chemicals in pursuit of clues to ozone production and loss, atmospheric cleansing, and pollution transport in the northern latitudes. Some of their findings, including a disappearance of ozone from the Arctic surface, appear in the February 28, 2003, issue of the Journal of Geophysical Research—Atmospheres.
Updates
Is
North America's Ozone Homegrown or Imported? New NCAR Analysis
Sheds Light on the Northern Hemisphere's Springtime Ozone Peak
(March 20, 2003)
Journal of Geophysical Research, Vol. 108, No. D4, 2003, Special
Section: Tropospheric Ozone Production About the Spring Equinox
(TOPSE)
TOPSE studies springtime in the Rockies—and all the way to the Arctic
UCAR Quarterly (Summer 2000)
Research Aircraft Finds Springtime Ozone Voids above Arctic Surface (February 7, 2001)
Field campaign
NCAR Scientists Fly into Arctic Circle Lured by Spring Ozone Highs (April 24, 2000)
TOPSE home page
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Storms, clouds, and rain
BAMEX (begun May 2003)
The Bow Echo and MCV Experiment examined some of the world's largest thunderstorm complexes for clues to how these storms wreak havoc and how forecasters can better predict their trails of damage. MCVs are mesoscale convective vortices, low-pressure centers associated with large clusters of storms.
Updates
22nd Conference on Severe Local Storms, Results from the BOW Echo and MCV Experiment (BAMEX) I (October 5, 2004)
22nd Conference on Severe Local Storms, Results from the BOW Echo and MCV Experiment (BAMEX) II (October 5, 2004)
Midwest Thunderstorm Study Points toward Better Forecasts (September 27, 2004)
Second BAMEX Workshop (April 11-12, 2004)
BAMEX Workshop Presentations (March 1-3, 2004)
Field campaign
In the midnight hour: BAMEX takes aim at dangerous night storms (May 2003)
Chasing mesoscale monsters:
BAMEX goes after bow echoes and thunderstorm vortices—UCAR Quarterly (Spring 2003)
BAMEX Visuals: Slide Show (May 6, 2003)
Scientists to Probe Giant Storm Clusters across Midwest (May 5, 2003) BAMEX Media Advisory: Midwest Severe Weather Study Begins with Media Day on May 19 (May 12, 2003)
BAMEX home page

IHOP2002 (begun May 2002)
Over 100 researchers profiled the water vapor that feeds heavy rain and thunderstorms across Kansas, Oklahoma, and Texas as part of the large, complex International H20 Project (IHOP2002).
Updates
The Case of the Missing Clouds: NCAR Observing System Finds High-Level Moisture with Global Implications (February 11, 2003)
A deluge we can't see: Water vapor's hide-and-seek journey through clear air and storminess—UCAR Highlights 2002
Weather, Climate, and the Evolving U.S. Climate Change Science Program—UCAR Quarterly (Summer 2002)
Field campaign
In Midst of Drought, Scientists Hunt for Water Vapor (May 7, 2002)
Where's the water vapor? IHOP2002 is on a mission to find out—UCAR Quarterly
(Spring 2002)
Massive Weather Study Heads for the Skies and Roads of Kansas, Oklahoma, and Texas (April 15, 2002)
IHOP2002 Media Advisory: Media Day for Major U.S. Weather Study (May 7, 2002)
IHOP home page

RAINEX (begun August 2005)
The Hurricane Rainband and Intensity Change Experiment focused on how the outer rainbands and inner eye of a hurricane interact to influence a storm's intensity. Researchers obtained unprecedented data while flying aircraft through hurricanes Rita, Katrina, and Ophelia. Their goal was to better understand dramatic, rapid changes in tropical storm intensity that have baffled forecasters for years.
Updates
27th Conference on Hurricanes and Tropical Meteorology, Special Session: RAINEX I (April 26, 2006)
27th Conference on Hurricanes and Tropical Meteorology, Special Session: RAINEX II (April 27, 2006)
Busy
times in the tropics: Hurricanes keep coastal residents—and
NCAR—hopping—UCAR Quarterly (Fall 2005)
Field campaign NCAR Radar Probes Hurricane Rainbands (August 8, 2005)
RAINEX: Bad weather is good news (November 2005)
RAINEX home page

REFRACTT (begun June
2006)
The Refractivity Experiment For H2O
Research And Collaborative operational Technology Transfer
deployed, for the first time, multiple Doppler weather radars to
track water vapor in the lower atmosphere. Researchers
measured changes in the speed of radar signals caused by refraction,
which in turn reveal the presence or absence of atmospheric moisture.
Measuring the low-level moisture is expected to help forecasters
pin down the locations and timing of storms that might rage a few
minutes to a few hours later.
Updates
Short-term
Weather Forecasting: The Colorado REFRACTT Demonstration (NCAR
Annual Report 2006/2007)
A new
eye on storm formation: REFRACTT tests out radar technique on
the Front Range (July-August 2006)
Field campaign
New Radar Technique Locates
Storm-Fueling Moisture (April 1, 2006)
REFRACTT Home Page

RICO (begun November 2004) The Rain in Cumulus over the Ocean experiment brought over 100 scientists and technicians to the Caribbean islands of Antigua and Barbuda to study trade wind cumulus clouds. With specially equipped ground radars and aircraft, research teams gathered data on the processes that turn cloud droplets into warm rain without going through an ice phase.
Updates
12th
Conference on Cloud Physics, Session 9: RICO (July 13, 2006)
12th
Conference on Cloud Physics, Session 10: RICO II (July 13, 2006)
RICO field project:
Cool heads prevail during a complicated study of warm rain (March 2005)
Field campaign
Up close with Caribbean cumulus (February 1, 2005)
RICO home page

STEPS (begun May 2000)
Scientists scanned the skies for lightning and "dry" supercell storms from a host of high-tech platforms in the High Plains near Goodland, Kansas, using storm-chasing vehicles, radars, and an armored research aircraft. The Severe Thunderstorm Electrification and Precipitation Study (STEPS-2000) was the largest effort to date to study lightning and low-precipitation storms. Updates
STEPS research presentations (August 2002)
Field campaign
Drought puts no damper on STEPS—Staff Notes Monthly (July 2000)
High technology meets the High Plains in STEPS-2000—UCAR Quarterly (Spring 2000)
Largest Effort Yet to Study Lightning and "Dry Storms" Brings High Tech to the High Plains of Colorado and Kansas (May 19, 2000)
STEPS home page
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Turbulence
T-REX (begun
March 2006)
The NSF/NCAR HIAPER aircraft (High-performance Instrumented Airborne
Platform for Environmental Research) flew a series of 10-hour
missions from its base at Jefferson County Airport
in Colorado to California's Owens Valley during the Terrain-Induced
Rotor Experiment, or T-REX. The aircraft explored the mountain
waves that form over the Sierra Nevada and are associated
with treacherous whirlwinds, known as rotors, as well as study the
impacts of the waves on atmospheric regions as high as the stratosphere.
The research will lead to better prediction of these aviation
hazards. Updates
Notes
from the field: Turbulence and pollution (May 2006)
T-REX: Catching the Sierra's waves and rotors—UCAR Quarterly (Spring 2006)
Field campaign
Advanced Aircraft to Probe Hazardous Atmospheric Whirlwinds (March 1, 2006)
T-REX home page
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Weather,
climate, space weather observations
COSMIC (begun April 2006)
A globe-spanning constellation of six satellites expected to improve
weather forecasts, monitor climate change, and enhance space weather
research entered low-Earth orbit on April 14, 2006. The satellites
in the Constellation Observing System for Meteorology, Ionosphere
and Climate will be the first to provide atmospheric
data daily in real time over thousands of points on Earth for both research and
operational weather forecasting by measuring the bending of radio
signals from the U.S. Global Positioning System
(GPS) as the signals
pass through Earth's atmosphere.
Updates
Innovative Satellite System
Proves its Worth with Better Weather Forecasts, Climate Data (December
11, 2006)
Launch
New Satellite System Will Use
GPS Signals To Track Hurricanes, Climate Change, and Space Weather (April
12, 2006)
COSMIC Visuals Gallery
COSMIC Fact Sheet
COSMIC home page
Sunrise Solar Telescope (begun October 2007)
NCAR and an international team of
research partners launched and tested a solar telescope
to an altitude of 120,000 feet, borne by a balloon larger than a
Boeing 747 jumbo jet. The 2007 test cleared the way for long-duration
polar balloon flights beginning in 2009 that will capture unprecedented
details of the Sun's surface. The unique approach promises to reveal
new insights into the Sun's magnetic field structures, which play
a role in electromagnetic storms that can affect satellite communication
systems, electrical power grids, and perhaps even climate. The project
may usher in a new generation of balloon-borne scientific missions
that cost less than sending instruments into space.
Launch
Solar
Telescope Reaches 120,000 Feet on Jumbo-Jet-Sized Balloon (October 23, 2007)
Sunrise Visuals & Multimedia Gallery
Sunrise Fact Sheet
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