Paleofire and Climate History in Siberia

社区变化的当地模式往往嵌入其中 更大的区域规模。对《公约》所作变动的解释 因此，地方规模是区域一级变化的函数。气候 波动和土地利用做法 是两个区域层面的过程，影响当地的动态， 森林群落结构和生物多样性。This project will use 树木生态学方法重建多世纪的区域性 南方针叶林的森林火灾和气候历史 西伯利亚高原中部火痕和环宽年表 将从一个网站的网络中开发出来。重建的大火 气候记录将被用来评估时间和空间 火灾活动的变化和趋势与世纪 气候和土地利用方式的长期波动。平行 在类似的森林古火灾和气候历史的研究， 美国西南部和加州的内华达州山脉将提供 比较数据，以评估 北方半干旱区区域尺度火灾气候学 美国和西伯利亚 %%% 这种长期的历史观点将提供基线数据 全球气候变化驱动的森林群落未来变化模型 变化和人类土地使用做法。此外，重建 火灾的发生将有助于评估 针叶林作为大气痕量气体的来源， 微粒最后，建议研究将加强 美俄科学合作关系 科学家

Local patterns of community changes are often embedded within larger regional scale processes. Interpretation of changes at the local scale are thus a function of regional level changes. Climatic fluctuation and land use practices are two regional level processes that affect local dynamics of forest community structure and biodiversity. This project will use dendro-ecological methods to reconstruct a multi-century, regional scale forest fire and climate history of southern taiga forests on the central Siberian Plateau. Fire scar and ring-width chronologies will be developed from a network of sites. The reconstructed fire and climate records will be used to assess temporal and spatial changes and trends in fire activity in association with centuries long fluctuations in climate and land use practices. Parallel studies of paleofire and climate histories in similar forests in the southwestern US and Sierra Nevada of California will provide comparative data for assessing differences and similarities of regional scale fire climatologies of semi-arid regions in North America and Siberia. %%% This long-term historical perspective will provide baseline data for models of future changes in forest communities driven by global change and human land-use practices. In addition, reconstruction of fire occurrence will be useful for assessing the importance of conifer forests as a source of atmospheric trace gases and particulates. Finally, the proposed research will strengthen collaborative scientiific relationships between US and Russian scientists.