Simulated anthropogenic methane and carbon dioxide enhancements for planning target mode satellite observations
Abstract
Monitoring anthropogenic greenhouse gas emissions from satellite can be made more efficient by focusing observations on emission plumes from megacities and other strong sources. Simulated concentration enhancements are useful for planning target model observations by pointing-capable satellite sensors, such as GOSAT, GOSAT-2, OCO-3, GeoCarb and others. Planners have to rely on either near-real time forecast or a simulated climatology of the concentration enhancements. We apply forward transport modeling with Lagrangian transport model FLEXPART to simulate local XCO2 and XCH4 enhancements around large point sources globally and to produce high resolution probability maps of the observing concentration enhancements at the level detectable from satellite sensor. The simulations of the column average tracer fields are performed by distributing emissions according the anthropogenic emission inventories, transporting emitted tracer for 3 days forward and sampling the vertical integral of tracer mass into 2-hourly averages. We use high resolution ODIAC inventory for carbon dioxide emissions from fossil fuel use and EDGAR inventory of total anthropogenic emissions for methane. Stack CO2 emissions by large point sources are emitted at higher elevation, while other CO2 and methane emissions are placed near the ground. NCEP-GFS meteorology at 0.5-degree resolution is used. The CO2 emissions except for point sources are distributed on 1' resolution grid, while CH4 emissions are given at 0.1-degree resolution. The column average tracer concentrations are sampled on 0.02-degree grid for CO2 and 0.05-degree grid for methane. Two-hourly concentration fields are processed to derive spatially-resolved statistics of relative frequency of concentration enhancements, provided as maps of probability of observing enhancements above several fixed concentration levels. Maps are produced as 3-monthly averages based on CO2 simulation for year 2015 and methane simulation for 2018.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.A43R3141M
- Keywords:
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- 0315 Biosphere/atmosphere interactions;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3360 Remote sensing;
- ATMOSPHERIC PROCESSES;
- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCES;
- 0428 Carbon cycling;
- BIOGEOSCIENCES