Project Details
Projekt
Desert Encroachment in Central Asia - Quantification of soil biogenic Nitric Oxide emissions by ground- and satellite-based methodologies (DEQNO)
Applicant
Dr. Buhalqem Mamtimin
Subject Area
Atmospheric Science
Term
from 2009 to 2014
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 144939829
The north-western Chinese province Xinjiang, part of the great deserts of Central Asia, currently experiences fast economic growth, intrinsically tied to substantial (and rapid) changes of land use, from desert/grassland to irrigation and fertilizer fed oasis agriculture. Substantial biogenic emissions of nitric oxide (NO; an indirect greenhouse gas) from Xinjiang s oases are supposed and expected to increase in near future. However, any measured data of soil biogenic NO emissions are entirely lacking from this remote region. We propose to deliver quantified estimates of NO fluxes (and evapotranspiration) plot, oasis, and regional scale. This will be achieved by (1) laboratory incubation measurements on representative soil samples, surface-vegetation-atmosphere-transport (SVAT) modeling, and GIS based up-scaling, (2) differential optical absorption spectroscopy based determination of vertical column densities of NO2 and H2O from satellite retrievals, and (3) ground based micrometeorological in-situ measurements, as well as Lagrangian dispersion modelling of concentrations and fluxes. Emphasis is given on validation (by a suite of in-situ field measurements) of both estimates, those which will be obtained by the laboratory/SVAT/GIS up-scaling approach, as well as those derived from satellite observations. This will be explicitly performed on diel as well as on plot and oasis scales.
DFG Programme
Research Grants
International Connection
China, Mongolia
