Record Details

Record 1 of 1
New Approaches to Quantifying Transport Model Error in Atmospheric CO2 Simulations
NTRS Full-Text: Click to View  [PDF Size: 10 KB]
Author and Affiliation:
Ott, L.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Pawson, S.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Zhu, Z.
Nielsen, J. E.(Science Systems and Applications, Inc., Greenbelt, MD, United States);
Collatz, G. J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Gregg, W. W.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: In recent years, much progress has been made in observing CO2 distributions from space. However, the use of these observations to infer source/sink distributions in inversion studies continues to be complicated by difficulty in quantifying atmospheric transport model errors. We will present results from several different experiments designed to quantify different aspects of transport error using the Goddard Earth Observing System, Version 5 (GEOS-5) Atmospheric General Circulation Model (AGCM). In the first set of experiments, an ensemble of simulations is constructed using perturbations to parameters in the model s moist physics and turbulence parameterizations that control sub-grid scale transport of trace gases. Analysis of the ensemble spread and scales of temporal and spatial variability among the simulations allows insight into how parameterized, small-scale transport processes influence simulated CO2 distributions. In the second set of experiments, atmospheric tracers representing model error are constructed using observation minus analysis statistics from NASA's Modern-Era Retrospective Analysis for Research and Applications (MERRA). The goal of these simulations is to understand how errors in large scale dynamics are distributed, and how they propagate in space and time, affecting trace gas distributions. These simulations will also be compared to results from NASA's Carbon Monitoring System Flux Pilot Project that quantified the impact of uncertainty in satellite constrained CO2 flux estimates on atmospheric mixing ratios to assess the major factors governing uncertainty in global and regional trace gas distributions.
Publication Date: Jan 01, 2012
Document ID:
20120015529
(Acquired Nov 07, 2012)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Report/Patent Number: GSFC.ABS.7157.2012
Document Type: Conference Paper
Meeting Information: North American Carbon Program Meeting; 4-7 Feb. 2013; Albuquerque, NM; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: ATMOSPHERIC GENERAL CIRCULATION MODELS; CARBON DIOXIDE CONCENTRATION; EARTH OBSERVING SYSTEM (EOS); ERROR ANALYSIS; GEOS SATELLITES (ESA); MIXING RATIOS; POLLUTION TRANSPORT; SIMULATION; TRACE CONTAMINANTS
Availability Notes: Abstract Only
› Back to Top
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed
Find Similar Records
 
NASA Logo, External Link

NASA Official: Gerald Steeman
Sponsored By: NASA Scientific and Technical Information Program
Site Curator: NASA Center for AeroSpace Information (CASI)
Last Modified: April 09, 2013

Privacy Policy & Important Notices Disclaimers, Copyright, Terms of Use Freedom of Information Act USA.gov NASA.gov NASA OCIO Free Adobe PDF Reader Free MS Word Viewer