대규모 원격상관 패턴이 시베리아 남동부 산불 발생에 미치는 영향
Impact of Large-scale Teleconnection Patterns on Wildfire Occurrences in Southeastern Siberia
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초록
This study investigated the large-scale teleconnection patterns inf luencing extreme wildfire events in Southeastern Siberia region during spring. Wildfires occurred from February to April. We defined extreme wildfire years as those with a burned fraction exceeding the average. Correlation analysis results indicated that the geopotential height and temperature in February and March influence the burned fraction in April. The years with extreme wildfires showed high-pressure, positive temperature and negative relative humidity anomalies in Southeastern Siberia region from February. During this period, the increase in solar radiation absorbed by the surface and the sensible heat released contributed to the rise in atmospheric temperature, resulting in a decrease in relative humidity. The high-pressure anomalies that occurred in southeastern Siberia during spring were closely related to the negative phase of the West Pacific (WP) pattern. When both negative WP and positive Arctic Oscillation (AO) occurred strongly, there were pronounced and strong high-pressure and positive temperature anomalies in Southeastern Siberia region. As a result, the dry environment conducive to wildfires is formed due to the occurrence of negative WP and positive AO in February and March.
Abstract
This study investigated the large-scale teleconnection patterns inf luencing extreme wildfire events in Southeastern Siberia region during spring. Wildfires occurred from February to April. We defined extreme wildfire years as those with a burned fraction exceeding the average. Correlation analysis results indicated that the geopotential height and temperature in February and March influence the burned fraction in April. The years with extreme wildfires showed high-pressure, positive temperature and negative relative humidity anomalies in Southeastern Siberia region from February. During this period, the increase in solar radiation absorbed by the surface and the sensible heat released contributed to the rise in atmospheric temperature, resulting in a decrease in relative humidity. The high-pressure anomalies that occurred in southeastern Siberia during spring were closely related to the negative phase of the West Pacific (WP) pattern. When both negative WP and positive Arctic Oscillation (AO) occurred strongly, there were pronounced and strong high-pressure and positive temperature anomalies in Southeastern Siberia region. As a result, the dry environment conducive to wildfires is formed due to the occurrence of negative WP and positive AO in February and March.
참고문헌 (16)
- Bond-Lamberty, B., "Fire as the dominant driver of central Canadian boreal forest carbon balance", Nature, 450(7166), pp.89~92 (2007)
- Chen, G., "Mortality risk attributable to wildfire-related PM2.5 pollution: a global time series study in 749 locations", The Lancet Planetary Health, 5(9), pp.e579~e587 (2021)
- Cuevas-González, M., "Analysing forest recovery after wildfire disturbance in boreal Siberia using remotely sensed vegetation indices", Global Change Biology, 15, pp.561~577 (2009)
- Giglio, L., "An active-fire based burned area mapping algorithm for the MODIS sensor", Remote Sensing of Environment, 113(2), pp.408~420 (2009)
- Goldammer, J. G., "Fire, Climate Change, and Carbon Cycling in the Boreal Forest", pp.49~64 (2000)
- Jolly, W. M., "Climate-induced variations in global wildfire danger from 1979 to 2013", Nature Communications, 6(1), pp.7537~ (2015)
- Kharuk, V. I., "Wildfires in the Siberian taiga", Ambio, pp.1~22 (2021)
- Kim, J. S., "Extensive fires in southeastern Siberian permafrost linked to preceding Arctic Oscillation", Science Advances, 6(2) (2020)
- Liu, Y., "Wildland fire emissions, carbon, and climate : wildfire-climate interactions", Forest Ecology and Management, 317, pp.80~96 (2014)
- Meng, M., "Winter North Atlantic SST as a precursor of spring Eurasian wildfire", Geophysical Research Letters, 49(18), pp.e2022GL099920~ (2022)
- Papadopoulos, A., "Investigating the relationship of meteorological", climatological conditions and wildfires in Greece, 2013, pp.112, 113~126
- Park, H. J., "Combined effect of the Arctic Oscillation and the Western Pacific pattern on East Asia winter temperature", Climate Dynamics, 46, pp.3205~3221 (2016)
- Schaepman-Strub, G., "What set Siberia ablaze?", Science, 378(6623), pp.944~945 (2022)
- Shvidenko, A. Z., "Climate change and wildfires in Russia", Contemporary Problems of Ecology, 6, pp.683~692 (2013)
- Stocks, B. J., "Large forest fires in Canada, 1959-1997", Journal of Geophysical Research : Atmospheres, 107(D1) (2002)
- Wallace, J. M., "Teleconnections in the geopotential height field during the Northern Hemisphere winter", Monthly Weather Review, 109(4), pp.784~812 (1981)