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  • M J Alvarado, J A Logan, J Mao, E Apel, D Riemer, D Blake +31 others
  • 2010
We determine enhancement ratios for NO x , PAN, and other NO y species from boreal biomass burning using aircraft data obtained during the ARCTAS-B campaign and examine the impact of these emissions on tropospheric ozone in the Arctic. We find an initial emission factor for NO x of 1.06 g NO per kg dry matter (DM) burned, much lower than previous(More)
Climate models incorporate photosynthesis-climate feedbacks, yet we lack robust tools for large-scale assessments of these processes. Recent work suggests that carbonyl sulfide (COS), a trace gas consumed by plants, could provide a valuable constraint on photosynthesis. Here we analyze airborne observations of COS and carbon dioxide concentrations during(More)
  • H B Singh, B E Anderson, W H Brune, C Cai, R C Cohen, J H Crawford +16 others
  • 2010
We analyze detailed atmospheric gas/aerosol composition data acquired during the 2008 NASA ARCTAS (Arctic Research of the Composition of the Troposphere from Aircraft and Satellites) airborne campaign performed at high northern latitudes in spring (ARCTAS-A) and summer (ARCTAS-B) and in California in summer (ARCTAS-CARB). Biomass burning influences were(More)
Radiocarbon samples taken over Mexico City and the surrounding region during the MILAGRO field campaign in March 2006 exhibited an unexpected distribution: (1) relatively few samples (23%) were below the North American free tropospheric background value (57±2‰) despite the fossil fuel emissions from one of the world's most highly polluted environments; and(More)
[1] Observed correlations between atmospheric concentrations of CO 2 and CO represent potentially powerful information for improving CO 2 surface flux estimates through coupled CO 2-CO inverse analyses. We explore the value of these correlations in improving estimates of regional CO 2 fluxes in east Asia by using aircraft observations of CO 2 and CO from(More)
Biogeosciences Discussions This discussion paper is/has been under review for the journal Biogeosciences (BG). Please refer to the corresponding final paper in BG if available. Abstract New observations of the vertically integrated CO 2 mixing ratio, CO 2 , from ground-based remote sensing show that variations in CO 2 are primarily determined by large-scale(More)
[1] We provide quantitative estimates for the spatial variability of CO 2 , crucial for assessing representativeness of observations. Spatial variability determines the mismatch between point observations and spatial averages simulated by models or observed from space-borne sensors. Such ''representation errors'' must be properly specified in determining(More)
Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Radiocarbon samples taken over Mexico City and the surrounding region during the MILAGRO field campaign in March 2006 exhibited an(More)
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