رکورد قبلیرکورد بعدی

" Daily and 3-hourly variability in global fire emissions and consequences for atmospheric model predictions of carbon monoxide "


Document Type : AL
Record Number : 912887
Doc. No : LA1xw768mv
Title & Author : Daily and 3-hourly variability in global fire emissions and consequences for atmospheric model predictions of carbon monoxide [Article]\ Mu, M.; Randerson, J. T; van der Werf, G. R; Giglio, L.; Kasibhatla, P.; Morton, D.; Collatz, G. J; DeFries, R. S; Hyer, E. J; Prins, E. M; Griffith, D. W. T; Wunch, D.; Toon, G. C; Sherlock, V.; Wennberg, P. O
Date : 2011
Title of Periodical : UC Irvine
Abstract : Attribution of the causes of atmospheric trace gas and aerosol variability often requires the use of high resolution time series of anthropogenic and natural emissions inventories. Here we developed an approach for representing synoptic- and diurnal-scale temporal variability in fire emissions for the Global Fire Emissions Database version 3 (GFED3). We disaggregated monthly GFED3 emissions during 2003–2009 to a daily time step using Moderate Resolution Imaging Spectroradiometer (MODIS)-derived measurements of active fires from Terra and Aqua satellites. In parallel, mean diurnal cycles were constructed from Geostationary Operational Environmental Satellite (GOES) Wildfire Automated Biomass Burning Algorithm (WF_ABBA) active fire observations. Daily variability in fires varied considerably across different biomes, with short but intense periods of daily emissions in boreal ecosystems and lower intensity (but more continuous) periods of burning in savannas. These patterns were consistent with earlier field and modeling work characterizing fire behavior dynamics in different ecosystems. On diurnal timescales, our analysis of the GOES WF_ABBA active fires indicated that fires in savannas, grasslands, and croplands occurred earlier in the day as compared to fires in nearby forests. Comparison with Total Carbon Column Observing Network (TCCON) and Measurements of Pollution in the Troposphere (MOPITT) column CO observations provided evidence that including daily variability in emissions moderately improved atmospheric model simulations, particularly during the fire season and near regions with high levels of biomass burning. The high temporal resolution estimates of fire emissions developed here may ultimately reduce uncertainties related to fire contributions to atmospheric trace gases and aerosols. Important future directions include reconciling top-down and bottom up estimates of fire radiative power and integrating burned area and active fire time series from multiple satellite sensors to improve daily emissions estimates.
کپی لینک

پیشنهاد خرید
پیوستها
عنوان :
نام فایل :
نوع عام محتوا :
نوع ماده :
فرمت :
سایز :
عرض :
طول :
1xw768mv_15545.pdf
1xw768mv.pdf
مقاله لاتین
متن
application/pdf
2.70 MB
85
85
نظرسنجی
نظرسنجی منابع دیجیتال

1 - آیا از کیفیت منابع دیجیتال راضی هستید؟