personal information yan xiaodong - lcluc program · 2015-12-17 · personal information yan...
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Personal Information
Yan XiaodongKey Lab. of Regional Climate-Enviroment for East Asia
START Regional Center for Temperate East AsiaInstitute of Atmospheric PhysicsChinese Academy of Sciences
Beijing 100029
Tel:+86-10-8299 5136fax:+86-10-8299 6135
Email:[email protected]
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Integrated Land Ecosystem -Atmosphere Processes Study
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What is iLEAPS?iLEAPS is the international reseach project of the International Geosphere -Biosphere Programme (IGBP).
The objective is to study how interacting physical, chemical and biological processes transport and transform energy and matter through the land-atmosphere interface.
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IGBP projects
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Why iLEAPS?Land surface atmosphere interface play a vital role in the functioning of earth system by managing tansfers of energy,momentum and matter
Land ecosystem’s function tends to be a key to understand and predict climate system
Human Activities often impact climate system through changing land ecosystem
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Observed rainfall anomalies
Atmosphere-Ocean model
Atmos-Ocean-Land
Atmos-Ocean-Land-Vegetation
Zeng et al.,
1999):Must
couple
atmosphere,
Ocean,Land and
Vegetation to
better future
predict
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A multidisciplinary international research program
Enhance understanding of processes, linkages and feedbacks in the land-atmosphere interface affecting the Earth System.
Promote scientific collaboration as well as synthesis and distribution of results to scientific, politic and public audiences.
iLEAPS vision
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• How do interacting physical, chemical and biological processes transport and transform energy, momentum and materials through the land-atmosphere system? And what are their implications for the dynamics of the Earth System?
• How did the terrestrial-ecosystem/atmosphere system function under pre-industrial conditions, and how are human activities influencing it?
• To what extent does the vegetation determine its physical and chemical environment on various temporal and spatial scales?
iLEAPS questions
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IGAC International Global Atmospheric Chemistry • Biosphere/atmosphere trace gas fluxes• Biomass burning• Large role of aerosols in climate change
BAHC Biospheric Aspects of the Hydrological Cycle• Completed in December 2002 • Land ecosystems as determinant in water and energy exchange• Land cover interaction with climate system
GCTE Global Change and Terrestrial Ecosystems• Completed in December 2003• Process-level understanding of the origin of gases and particles• The global carbon cycle
GAIM Global Analysis, Integration and Modelling• Merged to AIMES in September 2004
Roots of iLEAPS
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www.atm.helsinki.fi/ILEAPS
Synthesis papersJournal special issues
Website
Newsletter
Broschure
Posters
PowerPoint presentations
Press releases, events
Annual report
Recongnized project Recongnized project reportsreports
iLEAPS in Action
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iLEAPS integrative approach
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iLEAPS approach
Space
Time
Extra-regional/GlobalLong term observations + modelling
Intensive observations + modelling
Focu
ssed
Obs
erva
tions
,ex
perim
ents
Focu
ssed
Obs
erva
tions
,ex
perim
ents
Focu
ssed
Obs
erva
tions
,ex
perim
ents
Sub-local/cell, leaf, plant
Regional
Sub-regional/landscape
Mesoscale/Catchment
Local/Ecosystem
105
104
103
102
101
100
10-1
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• Exchange of reactive and conservative compounds.
• Feedbacks between land biota, aerosols, atmospheric composition and climate.
• Dynamics of the land surface-vegetation-water-atmosphere system
• Measuring and modelling material and energy transfers in the soil-canopy-boundary layer system.
iLEAPS land-atmosphere research
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• CO2 fluxes at interlinked scales, controls, couplings
• Control of interannual variation of CH4fluxes
• Relationship of VOC fluxes to carbon exchange and Net Biome Production
• Feedbacks hydrology/aerosols/VOC• Self-regulation of VOC fluxes• Nitrogen species cycling
Land-atmosphere exchange of reactive and conservative compounds: Key feedbacks in the Earth System
Focus 1
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• How changes in aerosols (esp. CCN) affect the cycles of water, energy and chemical species
• Chemical/microphysical effect of terrestrial (biogenic, smoke, dust) aerosols?
• Dust: cloud effects, anthropogenic perturbation• Aerosol/light interactions (absorption/scattering) in
ecology and climate change• Representation in climate models
Interactions and feedbacks between biogenic/ anthropogenic aerosol production, cloud processes, climate and the water cycle
Focus 2A
What controls natural aerosol and CCN abundance
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• Effects of global change (land-use, climate) on biospheric inputs to self-cleansing
• Effects of changing self-cleansing on biosphere (via oxidants, UV, …)
• Effects of vegetation fires on self-cleansing
Focus 2BSurface-atmosphere exchanges and the self-cleansing mechanism of the atmosphere
Role of terrestrial biosphere in self-cleansing (NOx, VOC, etc)
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Feedbacks and teleconnections in the land surfacevegetation - water - atmosphere system
• Interactions of soil moisture with energy and water flux
• Multiple stable states, and what are the thresholds between them?
• Relative importance of human-induced changes (land-use, greenhouse gases, aerosols) on climate
• Effects of changing radiation fields
Focus 3
Effects of land-use and vegetation dynamicson climate, including the water cycle
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• Surface flux measurements (validation, increase of accuracy)
• Boundary layer budget methods (validation, scaling)
• Aircraft flux measurements• Remote sensing• Turbulent fluxes and dry deposition• Integration, model development and
evaluation
Focus 4Transfer of materials and energy in the soil/canopy/boundary-layer system: Measurements and Modelling
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iLEAPS RecognizingCross/cutting links,feedbacks. integration(examples)
Processes in regions (examples) – “Hot Spots”
Savanna/Grassland Tropical Forest High latitude/Boreal
Ecosystem –aerosol/chemistry –climate
C-N interactions
Regional / CatchmentModelling
Global Modelling
Metric of totalanthropogenicinterface
Fire P
roject
AMMAetc
IANABISetc
NEESPIetc
AIMES
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iLEAPS recognized projects • AMMA (African Monsoon Multidisciplinary Analyses) • EUCAARI (Aerosol-Climate-Air Quality Interactions) • FIRE Task/ FLARES (Fire-Land-Atmosphere Regional Ecosystem Studies) • FLUXNET (a "network of regional networks") • IANABIS (Inter-American Network for atmospheric/BiosphericStudies)• iLEAPS/GEIA initative (vegetation dynamics-BVOC interactions) • iPILPS (Isotopes in Project for Intercomparison of Land-surface Parameterization Schemes) • LEARN (Land Ecosystem-Atmosphere Reactive Nitrogen)• LUCID (Land-Use and Climate, Identification of robust impacts)
NEESPI (Northern Eurasia Earth Science Partnership Initiative) NEESPI (Northern Eurasia Earth Science Partnership Initiative) • POLARCAT ( POLar study using Aircraft, Remote sensing, surface measurements and modelling of Climate, chemistry, Aerosols and Transport)• WATCH (Water and Global Change) • VOCBAS (Volatile Organic Compounds in the Biosphere-AtmosphereSystem) is recognized as iLEAPS supporting activity.
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Some Words for NEESPI Dry Land FocusingSome Words for NEESPI Dry Land Focusing
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Is dry land not hot spot? Tropical Rain Forest
•Dry land’s questions • precipitation increase• much warmer• evaporation decrease
•Why?•Dust aerosols?•Lcluc?•Hydrology?•Pollution aerosols?
•Enhance•Observation •Coordinated Experiment
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Thanks!Thanks!