NASA-funded scientists and others from around the world are gathering in
Brazil at an international conference to discuss research and discoveries of
how the Amazon ecosystem works.

The 2nd International Large Scale Biosphere Atmosphere Experiment in
Amazonia (LBA) Scientific Conference, is being held in Manaus, Amazonas,
Brazil from July 7 th through the 10th. The LBA experiment is an
international research initiative led by Brazil.

Scientists from around the world have been studying how changes in land use
and climate in the tropical rainforests and other areas of the Amazon will
affect the biological, chemical and physical functioning of the region,
including its sustainability and its influence over the global climate.

“The LBA project is studying rainforests and their surrounding ecosystems
such as those in Brazil because they have long been considered important to
the world’s carbon balance,” said Michael Keller of the University of New
Hampshire, the LBA project lead.

There are a number of field campaigns occurring in the Amazon this summer
and beyond. Below are some examples:

1) STUDYING THE CARBON BALANCE IN THE AMAZON REGION

Current measurements give scientists hints about the carbon balance in the
Amazon, and how different areas and types of land cover act as carbon sinks
or sources, but they lack a regional view. Pending agreement with Brazil, in
April 2003 (a wet, high water period) and October 2003 (a dry, low water
period), the LBA-ECO group plans to fly a University of North Dakota
research aircraft across the Brazilian Amazon region. The plane will be
fitted with sophisticated chemical sensors from Harvard University to
measure concentrations of carbon dioxide and carbon monoxide.

Combining in-flight chemistry results with models of atmospheric transport,
contributed by collaborators at the University of Sao Paolo (USP), the
combined group will gain two snapshots of carbon flux from local to regional
scales.

LBA-ECO contacts on this project:

Steve Wofsy, Harvard University, Email: scw@io.harvard.edu
Maria Assuncao Silva Dias, USP, Email: mafdsdia@model.iag.usp.br

2. USING SATELLITES TO DETERMINE EXTENT AND DAMAGE OF LOGGING

Logging is a growing land practice in Brazil’s Amazon, but the area of
forest annually affected by selective logging is hotly contested by
scientists. Selective logging, where only some of the trees in the forest
are harvested, has been difficult to quantify across the region. Brazilian
investigators from EMBRAPA, the Fundacao Floresta Tropical (a Brazilian NGO)
and US investigators from Stanford University and the USDA Forest Service
are teaming up to interpret Landsat satellite images to measure both the
extent of logging and the canopy damage caused. These studies are closely
tied to studies of the carbon balance of logging.

In a related experiment, researchers from the University of California,
Irvine, USP and Harvard are comparing the carbon balance from eddy flux
towers in logged and intact forests outside of Santarem, Para, Brazil.

LBA-ECO contacts on this project:

Greg Asner, Stanford University, Email: greg@globalecology.stanford.edu
Natalino Silva, EMBRAPA, Email: natalino@cpatu.embrapa.br
Michael Keller, USDA Forest Service, Email: michael@kaos.sr.unh.edu
Johan Zweede, Fundacao Floresta Tropical, Email: zweede@fft.org.br

3. ASSESSING THE COSTS AND EFFECTS OF FIRES ACROSS THE BRAZILIAN AMAZON, BY
SATELLITE AND ON THE GROUND

Fire is a major force shaping the Amazonian landscapes. For land managers
with moderate means, fire is the only affordable way to clear land and
maintain agro-pastoral systems. However, intentional fires often escape from
prescribed burn areas, damaging tree crops, fences, forests and even homes.
Fire damage and fire prevention are a growing concern on the Amazon
frontier. In addition, the use of fire brings adverse health effects to the
local populace, closes airports and even affects local weather. Fires are
also important sources of atmospheric trace gases and aerosols. LBA-ECO
investigators will continue their research to assess the effects of fires
across the Brazilian Amazon. In addition, they will continue measurement of
fire extent from satellites and comparing the satellite retrievals to ground
based observations.

LBA-ECO contacts on this project:
Daniel Nepstad, Woods Hole Research Center , Email: dnepstad@whrc.org
Carlos Klink, University of Brasilia, Email: klink@unb.br
Foster Brown, Woods Hole Research Center , Email: fbrown@uol.com.br

4. STUDYING NUTRIENTS AND THEIR AFFECTS ON SECONDARY FOREST RECOVERY

Secondary forests may be an important sink for carbon. But, do nutrients
limit the rate of secondary forest recovery? Experience with agriculture and
silviculture in the Amazon region suggests that soil nutrients are extremely
limited in the highly weathered soils of the region. Researchers from Woods
Hole Research Center and the Museo Paraense Emilio Goeldi (MPEG) have been
fertilizing second growth forests to learn how severely nutrients can limit
recovery.

They are also measuring the re-growth of secondary forests using Landsat and
IKONOS satellite imagery to analyze patterns of succession and ultimately to
measure secondary re-growth across the Amazon region.

LBA-ECO contacts on this project:
Eric Davidson, Woods Hole Research Center, Email: edavidson@whrc.org
Ima Vieira, MPEG, Email: ima@museu-goeldi.br

For reporters interested in attending the conference, it will take place at
the Centro de Convenções Studio 5, Distrito Industrial – Manaus, Avenida
Rodrigo Otávio, 3555, Brazil. The press room is # 7.

Journalists should register for the conference on line at:
http://lba.cptec.inpe.br/lba-conf-manaus02-en/

On the registration form, any media attending should indicate they are
journalists and no fees will be charged. Registration is needed for a badge
and comprehensive material.

For more information and images:
http://www.gsfc.nasa.gov/topstory/20020708carbamazon.html