Present and Past Variability in Monsoon Climate Over the Himalayas Reconstructed from Tree Rings

ATM-9630144库克，爱德华·R，哥伦比亚大学拉蒙特-多尔蒂地球天文台标题：喜马拉雅季风气候树轮的现在和过去的变化该奖项支持一项研究项目，该研究项目旨在根据气候敏感的绝对过时的年度树轮年表网络重建尼泊尔过去几个世纪的气候。用于此目的的主要年轮变量是年轮宽度。然而，还将对一些木材收集进行树轮密度的处理，以从树轮中提取尽可能多的有用气候信息。主要的重点将是重建影响喜马拉雅山脉的西南季风的各种特征。过去的温度往往与环密度的变化密切相关，也将被重建。因此，这项研究将产生各种气候重建。所有1960年以前的尼泊尔气候记录都将被数字化和分析，以更好地了解尼泊尔气候的空间模式，它们与印度较长记录的关系，并用于校准过去气候的树轮重建。在该项目期间，尼泊尔将编制50-100个树轮年表。其中大多数年表的长度将超过200年，有些年表可以追溯到300-400年前。此外，还将尝试进入不丹、巴基斯坦北部、克什米尔和锡金，以扩大这一努力的地理覆盖面。

Abstract ATM-9630144 Cook, Edward R, Columbia University Lamont-Doherty Earth Observatory Title: Present and Past Variability in Monsoon Climate Over the Himalayas from Tree Rings This award supports a research project designed to reconstruct climate of the past few centuries over Nepal from a network of climatically sensitive, absolutely dated, annual tree-ring chronologies. The principal tree-ring variable for this purpose is ring width. However, some of the wood collections will also be processed for tree-ring density to extract as much useful climate information as possible from the tree-rings. The principal emphasis will be on reconstructing various features of the Southwest Monsoon as it affects the Himalayas. Past temperatures, which tend to be tightly linked to variations in the ring density, will also be reconstructed. Therefore, a variety of climatic reconstructions will result from this research. All of the pre-1960 Nepalese climate records will be digitized and analyzed to better understand the spatial patterns of climate in Nepal, their relationships with longer records in India, and for calibrating the tree-ring reconstructions of past climate. 50-100 tree-ring chronologies will be developed in Nepal over the life of this project. Most of these chronologies will exceed 200 years in length, with some extending back 300-400 years. In addition, attempts will be made to gain access to Bhutan, northern Pakistan, Kashmir, and Sikkim to extend the geographic coverage of this effort.