The influence of regional surface soil moisture anomalies on forest fires in Siberia observed from satellites
Open Access
- 27 October 2009
- journal article
- research article
- Published by IOP Publishing in Environmental Research Letters
Abstract
Forest fires are frequent in the Siberian taiga and are predicted to increase in frequency as a result of increased fire risk under drought conditions, and prolonged fire seasons caused by climate change. There is, however, some uncertainty as to the extent to which drought influences forest fire frequency at a regional scale. Here, we present an analysis of satellite derived soil moisture anomaly data from ERS-1/2 (ERS: Earth Resources Satellite) scatterometer data and burned area maps from MODIS/AVHRR/ATSR (Moderate Resolution Imaging Spectroradiometer/Advanced Very High Resolution Radiometer/Along-Track Scanning Radiometer) over Central Siberia for the years 1992-2000. The purpose of this study is to investigate the relationship of remotely sensed soil moisture deviations from the long-term mean and fire within the boreal biome on a sub-continental scale. Results show that wet surface soil moisture conditions limit the extent of burned area. They can prevent the outbreak of fires but the magnitude of a negative (dry) deviation does not determine the maximum size of fire affected areas. It is known from the literature, however, that an ignition is more likely to occur under low surface wetness conditions, such as those that we observed during July and August in both permafrost and non-permafrost regions. Although the burned area under drier conditions in July is lowest over non-permafrost, the actual number of fires is as high as over continuous permafrost. Approximately 80% of all events occurred under such conditions during that month. The fire size was below 50 km(2) under moist conditions. Larger burned areas have in general not been detected when the surface wetness deviation exceeded +5%.Keywords
This publication has 45 references indexed in Scilit:
- Antecedent wetness conditions based on ERS scatterometer dataJournal of Hydrology, 2009
- Fire models and methods to map fuel types: The role of remote sensingForest Ecology and Management, 2008
- Temporal Stability of Soil Moisture and Radar Backscatter Observed by the Advanced Synthetic Aperture Radar (ASAR)Sensors, 2008
- An assessment of potential change in wildfire activity in the Russian boreal forest zone induced by climate warming during the twenty-first centuryClimatic Change, 2007
- Coupling of Vegetation Growing Season Anomalies and Fire Activity with Hemispheric and Regional-Scale Climate Patterns in Central and East SiberiaJournal of Climate, 2007
- Soil moisture from operational meteorological satellitesHydrogeology Journal, 2006
- A statistical model linking Siberian forest fire scars with early summer rainfall anomaliesGeophysical Research Letters, 2006
- Evaluation of the agreement between the first global remotely sensed soil moisture data with model and precipitation dataJournal of Geophysical Research: Atmospheres, 2003
- Interannual covariability in Northern Hemisphere air temperatures and greenness associated with El Niño‐Southern Oscillation and the Arctic OscillationJournal of Geophysical Research: Atmospheres, 2003
- The Arctic Oscillation signature in the wintertime geopotential height and temperature fieldsGeophysical Research Letters, 1998