This is needed for climate change modelling and estimation of national greenhouse gas (GHG) inventories. These gases – largely nitrous and nitric oxide are responsible for up to 10% of the anthropogenic greenhouse effect. Terrestrial ecosystems account for about two-thirds of the emissions, split roughly 50:50 between natural ecosystems (soils) and agriculture (about 25% from mineral fertiliser and 50% from livestock and their manure) though there is great uncertainty about this because of the wide range of emission coefficients for different agricultural sources. Emissions could increase 35-60% over the next 30 years, so it is important to improve the spatial coverage and quality of the non C GHG data going into climate change modelling.
Contributing baseline GCOS observations
None.
Other contributing observations
FAO soil map of the world and AEZ data. FAO AGROSTAT for land cover and land use data including livestock numbers and mineral fertiliser use. TOPC fire area and the Global Fire Product. IGBP experiments.
Significant data management issues
Lack of consensus on approach for land use classification.
Analysis products
Time series for national and sub-national average emissions from livestock and fertilizer use.
Time series for national average emissions from natural ecosystems using soil and AEZ data.
Current capability
Land cover estimates from remote sensing can be combined with vegetation maps and national agricultural statistics to provide land use estimates. These can be used with survey data on fertilizer use by crops and average emission values to give gross N2O and NOx estimates of +/- 50% accuracy.
Issues and priorities -
There is great uncertainty about the magnitude of the current agricultural contribution of 4.7 million ton per year to total global emissions, because:
-
many of the contributing observations are national average values and are not spatially explicit;
-
the high heterogeneity of natural ecosystems and different agricultural sources leads to a wide range of estimates in mean emission values (e.g. because of the sensitivity of N2O formation to climate, soil type, tillage practices, and type and placement of fertilizer);
-
it is likely that some emission rates are very non-linear, e.g. N2O from mineral fertilisers yet there is only limited information on this;
-
some of the most comprehensive estimates are from short-term experiments.
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For some countries, the contribution from terrestrial ecosystems to greenhouse gas emissions (GHG) emissions is a greater proportion of the national totals than fossil fuels.
-
Lack of consensus on land use classification approaches and generally weak data base on present land-use though poor progress is a funding issue rather than a technological one. Action here is required for many other parameters and global change assessments and hence should receive high priority.
-
As with methane the main increase in emissions over the next 25-50 years may come from the livestock sector though uncertainties regarding the contribution of biomass burning will remain important for some time. Priority should therefore be given to estimating improved average emission factors for livestock systems and manure use and better integration of satellite and in situ observations for vegetation type and biomass density.
GENERAL REFERENCES
CEOS Yearbook, 1997: Committee on Earth Observation satellites: Towards an Integrated Global Observing Strategy. Smith System Engineering Limited, UK. Copyright 1997 European Space Agency (ESA).
IPCC, 2001: Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the third assessment report of the Intergovernmental Panel on Climate Change [J.T. Houghton, Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell, and C.A. Johnson (eds.)]. Cambridge University Press, Cambridge, United Kingdom.
NRC (National Research Council), 1999: Adequacy of the climate observing systems. National Academy Press, Washington, D.C., 51pp.
OceanObs 99 Conference Statement. OceanObs 99 International Conference on the Ocean Observing System for Climate, 18-22 Oct. 1999, Saint-Raphaël, France.
WMO (World Meteorological Organization), 1998: Report on the adequacy of the Global Climate Observing Systems -- United Nations Framework Convention on Climate Change, WMO GCOS-48. World Meteorological Organization, Geneva, Switzerland.
Acronyms and Abbreviations
ACE-2 North Atlantic Regional Aerosol Characterization Experiment
ADCP Acoustic Doppler Current Profiler
AEROCE Aerosol Oceanic Chemistry Experiment
AEZ Agro-Ecological Zoning (FAO system for land resource assessment)
AGAGE Advanced Global Atmospheric Gas experiment
AMDAR Aircraft Meteorological Data Relay
AMSR-E Advanced Microwave Scanning Radiometer-EOS, NASA
AMSU Advanced MSU
AO Arctic Oscillation
AOGCMS Atmosphere-Ocean General Circulation Model
AOPC Atmospheric Observation Panel for Climate
AQUA NASA Earth science satellite mission to study the Earth’s water cycle
Argo A global array of profiling floats (part of IGOS)
ARM Atmospheric Radiation Measurements
ASAP Automated Shipboard Aerological Programme
ASDAR Aircraft-to-Satellite Data Relay
ASOS Automated Surface Observing System
ASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer
ATSR Along Track Scanning Radiometer
AUV Autonomous Underwater Vehicle
AVHRR Advanced Very High Resolution Radiometer
AWOS Automated Weather Observing System
BATS Bermuda Atlantic Time Series
BSRN Baseline Surface Radiation Network
CACGP Commission for Atmospheric Chemistry and Global Pollution
CALM Circumpolar Active Layer Monitoring
CAPMoN Canadian Air and Precipitation Monitoring Network
CARDS Comprehensive Aerological Reference Data Set
CBS Commission for Basic Systems
CCN Cloud Condensation Nuclei
CDIAC Carbon Dioxide Information Analysis Center
CEOS Committee on Earth Observation Satellites
CERES Cloud and Earth Radiant Energy System
CliC Climate and Cryosphere (WCRP)
CLIMAT Monthly surface climate summary report
CLIMAT TEMP Report of monthly aerological means from a land station
CLIVAR Climate Variability and Predictability (study) of WCRP
CLP Cold Land Processes Experiment
CMDL Climate Monitoring and Diagnostic Laboratory
COADS Comprehensive Ocean Atmosphere Data Set
COAPS Center for Ocean-Atmosphere Prediction Studies, FSU
COARE Coupled Ocean-Atmosphere Response Experiment (TOGA)
COP Conference of the Parties (to UNFCCC)
COSMIC Constellation Observing System for Meteorology, Ionosphere and Climate
CRF Cloud Radiative Forcing
CRN Climate Reference Network
CRU Climatic Research Unit, University of East Anglia (UK)
CRYSYS Study of variability and change in the Canadian CRYospheric SYStem
CTD Conductivity-Temperature-Depth Probe
DAO Data Assimilation Office (NASA, USA)
DARE DAta REscue
DEM Digital Elevation Model
DIC Dissolved Inorganic Carbon
DMS Data Management System
DMSP Defense Meteorological Satellite Program (USA)
DORIS Doppler Orbitography by Radiopositioning Integrated by Satellite
DQO Data Quality Objective
DWD Deutscher Wetterdienst (Germany)
EASE Equal Area Scalable Earth (grid)
ECMWF European Centre for Medium range Weather Forecasts
EF Evaporation Fraction
EI Environment Institute
EMEP Co-operative programme for monitoring and evaluation of the long-range transmission of air pollutants in Europe
ENSO El Niño/Southern Oscillation
EOS Earth Observing Satellite
EOSDIS Earth Observing System Data Information System
ERA ECMWF ReAnalysis
ERB Earth Radiation Budget
ERBE Earth Radiation Budget Experiment
ERBS Earth Radiation Budget Satellite
ESA European Space Agency
ETH Federal Institute of Technology, Zurich
EUMETSAT European Organization for the Exploitation of Meteorological Satellites
FAO Food and Agriculture Organization of the United Nations
FAPAR Fraction of Photosynthetically Active Radiation
FLUXNET Global network to measure exchanges of CO2, water vapour and energy between terrestrial ecosystems and the atmosphere
FoG Fluctuations of Glaciers
FPAR Plant-absorbed Fraction of Incoming Photosynthetically Active Radiation
FSU Florida State University
GAW Global Atmosphere Watch
GAWSIS GAW Information System
GAWTEK GAW Training and Education Centre
GCM General (or global) Circulation Model
GCN GLOCC Core Network
GCOS Global Climate Observing System (WMO/IOC/ICSU/UNEP)
GDP Global Drifter Program
GEBA Global Energy Budget Archive, Zurich
GEF Global Environment Facility
GEMS Global Environmental Monitoring System
GEOSECS Geochemical Ocean Sections Study
GERB Geostationary Earth Radiation Budget
GHCN Global Historical Climatological Network
GHG Greenhouse Gas
GHOST Global Heirarchical Observing Strategy
GLIMS Global Land Ice Measurements from Space
GLOSS Global Sea Level Observing System
GMS Geostationary Meteorological Satellite (Japan)
GO3OS Global Ozone Observing System
GOCE Gravity Field and Steady-State Ocean Circulation Mission (ESA)
GODAE Global Ocean Data Assimilation Experiment
GOES Geostationary Operational Environmental Satellite
GOOS Global Ocean Observing System (IOC/WMO/ICSU/UNEP)
GOS Global Observing System
GPCC Global Precipitation Climatology Centre
GPCP Global Precipitation Climatology Project
GPS Global Positioning System
GRACE Gravity Recovery and Climate Experiment
GRAS Global navigation satellite systems radio occultation GNSS Receiver for Atmospheric Sounding (ESA)
GRDC Global Runoff data Centre, Koblenz
GRID Global Resource Information Database
GSN GCOS Surface Network
GSNMC GCOS Surface Network Monitoring Centre
GTN-G Global Terrestrial Network for Glaciers
GTN-H Global Terrestrial Network for Hydrology
GTN-E Global Terrestrial Network for Ecology
GTN-P Global Terrestrial Network for Permafrost
GTOS Global Terrestrial Observing System (FAO/ICSU/UNEP/UNESCO/WMO)
GTS Global Telecommunications System
GUAN GCOS Upper Air Network
HadRT Hadley Centre data set of monthly global gridded temperature anomalies computed from radiosonde station data from 1958 to present
HadSLP Hadley Centre Historical gridded global monthly Mean Sea Level Pressure (MSLP) data set
HCN Historical Climatology Network
HSDSD Historical Soviet Daily Snow Depth
HOT Hawaii Ocean Time-series
IAEA International Atomic Energy Agency
IASI Infrared Atmospheric Sounding Interferometer
ICLAS International Coordination group for Laser Atmospheric Studies
ICOADS International Comprehensive Ocean Atmosphere Data Set
ICOLD International Commission on Large Dams
ICSI International Commission on Snow and Ice
ICSU International Council for Science
IGAC International Global Atmospheric Chemistry Programme
IGACO Integrated Global Atmospheric Chemistry Observation
IGBP International Geosphere-Biosphere Programme
IGOS Integrated Global Observing Strategy
IGOSS Integrated Global Ocean Services System (IOC/WMO)
IGRAC International Groundwater Resources Assessment centre
IHDP International Human Dimensions Programme on Global Environmental Change
ILEC International Lake Environment Committee
IMPROVE Interagency Monitoring of Protected Visual Environments Network
IMS Interactive Multisensor Snow and Ice Mapping System
IOC Intergovernmental Oceanographic Commission (of UNESCO)
IOC International Ozone Commission
IOCCG International Ocean Colour Coordinating Group
IPA International Permafrost Association
IPCC Intergovernmental Panel on Climate Change (WMO/UNEP)
IR Infrared
IRRI International Rice Research Institute
IUGG International Union of Geodesy and Geophysics
JASON Oceanography mission to study global ocean circulation (post-Topex/Poseidon)
JCOMM Joint Technical Commission for Oceanography and Marine Meteorology
JGOFS Joint Global Ocean Flux Study (within IGBP)
JMA Japan Meteorological Agency
JRC Joint Research Centre
LAI Leaf Area Index
LIDAR Light Detection and Ranging
LUCC Land-Use and Cover Change (IGBP/IHDP)
MBB Mass Balance Bulletin
MCDW Monthly Climatic Data of the World (surface and upper air)
MISR Multi-angle Imaging Spectrometer
ML (Upper ocean) Mixed Layer
MODIS Moderate Resolution Imaging Spectroradiometer
MOPITT Measurement of Pollution in the Troposphere
MSU Microwave Sounding Unit
NAO North Atlantic Oscillation
NARSTO North American Research Strategy for Tropospheric Ozone
NASA National Aeronautics and Space Administration (USA)
NASDA National Space Development Agency (Japan)
NCAR National Center for Atmospheric Research (USA)
NCDC National Climatic Data Center of NOAA (USA)
NCEP National Centres for Environmental Prediction of NOAA (USA)
NDSC Network for the Detection of Stratospheric Change (USA)
NDSI Normalized Difference Snow Index
NDVI Normalized Difference Vegetation Index
NEE Net Ecosystem Exchange from Eddy Correlation, CO2 Flux
NERC Natural Environment Research Council (UK)
NESDIS National Environmental Satellite, Data and Information Service of NOAA (USA)
NH Northern Hemisphere
NHS National Hydrological Service
NILU Norwegian Institute for Air Research
NMHS National Meteorological and Hydrological Service
NMS National Meteorological Service
NOAA National Oceanic and Atmospheric Administration
NODC National Oceanic Data Center
NPOESS National Polar Orbiting Operational Environmental Satellite System
NPP Net Primary Production
NRC National Research Council (USA)
NSCAT NASA Scatterometer
NSF National Science Foundation
NSIDC National Snow and Ice Data Center
NVAP NASA Water Vapor Project
NWP Numerical Weather Prediction
NWS National Weather Service
OACES Ocean Atmosphere Carbon Exchange Study, NOAA
ONR Office of Naval Research
OOPC Ocean Observations Panel for Climate
OSE Observing System Experiment
PACE Permafrost and Climate in Europe
PAR Photosynthetically Available Radiation
PATMOS Pathfinder Atmosphere
PDO Pacific Decadal Oscillation
PET Potential Evapotranspiration
PFR Precision Filter Radiometer
PIBALs Wind Soundings
PIRATA Pilot Research Moored Array in the Tropical Atlantic
PO.DAAC Physical Oceanography Distributed Active Archive Center
POES Polar Orbiting Environmental Satellite
PSC Polar Stratospheric Clouds
PSMSL Permanent Service for Mean Sea Level
PUMA Preparation for the use of METEOSAT Second Generation in Africa
QA/QC Quality Assurance/Quality Control
RAOBS Radiosonde soundings
RBCN Regional Basic Climate network
RBSN Regional Basic Synoptic Network
RCM Regional Climate Model
RH Relative humidity
RIVM Rijksinstituut voor Volksgezondheid en Milieu, NL
SAG Scientific Advisory Group
SATOBS Satellite Wind Observations
SBSTA Subsidiary Body for Scientific and Technical Advice (of UNFCCC/COP)
SeaBASS SeaWiFS Bio-optical Archive and Storage System
SeaDASS SeaWiFS Data Analysis System
SeaWiFS Sea-viewing Wide-Field-of-view Sensor
SEVIRI Spinning Enhanced Visual and Infrared Imager
SH Southern Hemisphere
SHADOZ Southern Hemisphere ADditional OZonesondes
SHI State Hydrological Institute, St. Petersberg
SMMR Scanning Multichannel Microwave Radiometer
SOOP Ship of Opportunity Programme
SOP Standard Operating Procedure
SPARC Stratospheric Processes and their Role in Climate (of WCRP)
SRB Surface Radiation Budget
SSM/I Special Sensor Microwave/Imager
SST Sea Surface Temperature
SWE Snow Water Equivalent
SYNOP Report of surface meteorological observation (synoptic time) from a land station
T Temperature (Td, dew point temperature; Tw, Wet bulb Temperature)
TAO Tropical Atmosphere Ocean Array
TAR Third Assessment Report (of IPCC)
TERRA Flagship satellite of NASA’s Earth Observing System
TIROS Television Infrared Observations Satellite
TIROS-N Next-generation TIROS
TOA Top of the Atmosphere
TOGA Tropical Ocean-Global Atmosphere study of WCRP
TOMS Total Ozone Mapping Spectrometer
TOPC Terrestrial Observations Panel for Climate
TOPEX Ocean Surface Topography Experiment
TOPEX/POSEIDON US/French Ocean Topography Satellite Altimeter Experiment
TOVS TIROS Operational Vertical Sounder
TRITON Triangle Trans Ocean Buoy Network (Japan)
TRMM Tropical Rainfall Measurement Mission
UARS Upper Atmosphere Research Satellite
UCI University of California at Irvine
UM University of Miami
UN United Nations
UNCED United Nations Conference on Environment and Development (Brazil, 1992)
UNDP United Nations Development Programme
UNEP United Nations Environment Programme
UNESCO United Nations Educational Scientific and Cultural Organization
UNFCCC United Nations Framework Convention on Climate Change
UTC Co-ordinated Universal Time
VOS Volunteer Observing Ship
VOSCLIM Volunteer Observing Ship Climate Project
WB World Bank
WCP World Climate Programme
WCRP World Climate Research Programme
WDC World Data Centre
WDCGG WDC for Greenhouse Gases
WGI IPCC Working Group I
WGII IPCC Working Group II
WGIII IPCC Working Group III
WGMS World Glacier Monitoring Service
WHO World Health Organization
WHYCOS World Hydrological Cycle Observing System
WMO World Meteorological Organization
WOCE World Ocean Circulation Experiment (of WCRP)
WOOD World Ocean Optical Data
WORCC World Optical Depth Research and Calibration Centre, Davos
WOUDC World Ozone and UV Data Center (Canada)
WRC World Radiation Centre, Davos
WRDC World Radiation Data Centre, St. Petersberg, Russia
WWW World Weather Watch
XBT eXpendable Bathy-Thermograph
Chemistry terms
C Carbon
CCl4 Carbon tetrachloride
CFC Chlorofluorocarbon
CH3CCl3 Methyl chloroform
Ch4 Methane
CO Carbon Monoxide
C02 Carbon Dioxide
h2 Hydrogen
HCFC Hydrochloroflurocarbon
HFC Hydroflurocarbon
H2O Water vapour
MSA Methanesulfonate
N2 Molecular Nitrogen
NH3 Ammonia
No Nitric Oxide
NO2 Nitrogen Dioxide
NOx Nitrogen Oxides (NO and NO2)
N2O Nitrous Oxide
O2 Molecular Oxygen
O3 Ozone
PFC Perfluorocarbon
SF6 Sulphur hexafluoride
SO2 Sulphur Dioxide
VOC Volatile Organic Compound
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