According to satellite monitoring data, the paper provides an analysis of the long-term dynamics of forest fires on the territory of five regions - the Irkutsk Region, the Republic of Buryatia, Transbaikalia, the Amur Region, and the Khabarovsk Territory. In the period 2004-2018, the changes in the area of forest fires (burned area) and the number of fires were. Climatic and circulation factors are considered as the causes of the forest fires. The key factors of high forest fire intensity are the processes of anticyclogenesis, which are developed with the strengthening of the meridional forms of atmospheric circulation in recent decades in Eastern Siberia. The high frequency of blocking anticyclones in the period May-June determines the long-term maintenance of the warm and dry air mass. In the long-term dynamics throughout the study area, there is an increase in temperature and a decrease in relative humidity.
We have compared Total Cloud Cover (TCC) data from ECMWF ERA-Interim reanalysis project and precipitation data from the GPCC project in July over 1979 – 2016. The region of our special interest covers Mongolia and southern part of Eastern Siberia. The models predict TCC. It is subject to errors related to physical parameterizations used in the model and needs to be examined. А precipitation from GPCC is a set of observation data interpolated into regular grid points. Although precipitation is indirectly related to cloudiness, we revealed a good agreement in interannual dynamics between two data sets over the region excluding the period 1982 – 1989 with the poor agreement (overestimated TCC data). This fact allows us to use TCC for the study of atmospheric circulation features over Mongolia and southern part of Eastern Siberia in the years with the good agreement of data. We revealed that precipitation intensity in the region depends on East Asian summer monsoon intensity. We also revealed that the atmospheric blocks over Eastern Siberia (90°E – 120°E) were observed for high TCC values and positive precipitation anomalies over the Selenga River basin (1990 and 1993) and there were no blocks over Eastern Siberia for low TCC values and negative precipitation anomalies (1980 and 2007).
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.