IAI Workshop: The Assessment of Present, Past and Future Climate Variability in the Americas from Treeline Environments

9530427条勒克曼树线是山区关键的、对气候敏感的交错带，一直是许多环境变化研究的重点。了解这些环境的现在和过去的动态对于解释这些记录至关重要。IGBP-PAGES为美洲采用PEP-I横断面概念，为在美国科迪勒拉山脉树线或附近工作的科学家提供了无与伦比的合作研究机会。这项提案请求IAI初创企业赠款第一阶段资金，以便于1996年9月底至10月初在加拿大艾伯塔省贾斯珀举办一次研讨会，重点讨论美国科迪勒拉山脉沿线的树线环境。这次会议将汇集来自IAI成员国的科学家，他们是古生态学、树木年代学和气候学等广泛领域的专家。这种混合将使该小组能够制定一项科学计划，以了解目前树线环境的动态，并重建树线地点的环境和气候变化。与会者将审查美国科迪勒拉地区树线环境的现有信息库，并讨论如何进行协作比较研究，以评估在现代树线地点发现的气候信号，并确定这一敏感环境对近期气候变化的反应；建立一个具有可比性的高分辨率替代气候系列网络，显示关键地区过去1000年树线上的内部气候变化；并利用这些数据来研究当地和区域的内部和较长期气候变化模式，以制定关于强迫作用的关键时间和空间模式的数据。这次会议将为实施这一科学议程的IAI初创企业赠款第二阶段制定一系列合作的、国际的、跨学科的研究提案。林线是关键的、气候敏感的山区，一直是许多环境变化研究的重点。了解这些环境的现在和过去的动态对于解释这些记录至关重要。国际地圈生物圈计划的“过去全球变化计划”(IGBP-PAGES)采用了美洲极-赤道-极(PEP-I)样带概念，为在美国科迪勒拉山脉的树状线或附近开展合作研究的科学家提供了无与伦比的机会。这项提案要求IAI初创企业赠款第一阶段资金，以便于1996年9月底至10月初在加拿大艾伯塔省贾斯珀举行一次会议，重点讨论美国科迪勒拉山脉沿线的树木环境。这次会议将汇集来自IAI成员国的科学家，他们是古生态学、树木年代学和气候学等广泛领域的专家。这种混合将使该小组能够制定一项科学计划，以了解目前树线环境的动态，并重建树线地点的环境和气候变化。本次会议计划开展一系列协作的、国际的、跨学科的IAI第二阶段创业赠款研究，以落实这一科学议程。这些建议将通过促进在山区环境和气候变化方面有共同利益的几个IAI成员国的科学家和机构的合作研究来促进和加强IAI的科学目标。它们还将把地球、生命和物理科学的不同科学专家群体聚集在一起，并促进他们之间的互动，他们以完全不同的方式关注同一环境。会议的另一项成果将是会议记录卷(“美洲树系环境”)，其中将总结会议上介绍的信息和讨论情况。该提案的参与者来自以下IAI国家：阿根廷、玻利维亚、加拿大、智利、美国和委内瑞拉。这些国家是IAI的成员国，IAI是一项旨在鼓励美洲就全球变化问题进行合作研究的倡议。国家科学基金会是指定的美国政府，在IAI内履行美国的责任。***

9530427 Luckman Treelines are critical, climate-sensitive, ecotones in mountain areas that have been the focus of many studies of environmental change. Understanding the present and former dynamics of these environments is crucial to the interpretation of these records. The adoption of PEP-I transect concept for the Americas by IGBP-PAGES offers unparalleled opportunities for collaborative studies by scientists working at or near treelines along the length of the American Cordillera. This proposal requests IAI Start-Up Grant Phase I funding to hold a workshop in Jasper, Alberta, Canada in late September- early October 1996, to focus on treeline environments along the American Cordillera. The meeting will bring together scientists from IAI member countries who are experts in a wide range of fields: paleoecology, dendrochronology, and climatology. This mix will allow the group to formulate a science plan for the understanding of the dynamics of present treeline environments, and the reconstruction of environmental and climate changes at treeline sites. The participants will review the present information base on treeline environments along the American Cordillera and discuss the formulation of collaborative, comparative studies, that will evaluate and benchmark the climate signals found at modern treeline sites and determine the response of this sensitive environment to recent climate variation; develop a network of comparable high resolution proxy climate series that show internal climate variation at treeline over the last ca 1000 years for key localities; and utilize these data to examine the local and regional patterns of internal and longer term climate variability to develop data on key temporal and spatial patterns of forcing functions. This meeting will lead to the development of a series of collaborative, international, interdisciplinary research proposals for Phase II of the IAI Start-Up Grants that implement this scientific agenda. %%% Treelines are critical, climate-sensiti ve mountain areas that have been the focus of many studies of environmental change. Understanding the present and former dynamics of these environments is crucial to the interpretation of these records. The adoption of the Pole-Equator-Pole (PEP-I) transect concept for the Americas by the International Geosphere Biosphere Programme's "Past Global Changes Program" (IGBP-PAGES) offers unparalleled opportunities for collaborative studies by scientists working at or near treelines along the length of the American Cordillera. This proposal requests IAI Start-Up Grant Phase I funding to hold a meeting in Jasper, Alberta, Canada in late September- early October 1996 and to be focused on treeline environments along the American Cordillera. The meeting will bring together scientists from IAI member countries who are experts in a wide range of fields: paleoecology, dendrochronology, and climatology. This mix will allow the group to formulate a science plan for the understanding of the dynamics of present treeline environments, and the reconstruction of environmental and climate changes at treeline sites. This meeting is planned to lead to the development of a series of collaborative, international, interdisciplinary Phase II IAI Start-Up Grants research that implement this scientific agenda. These proposals will promote and enhance the IAI scientific goals by fostering collaborative studies by scientists and institutions in several IAI member states that share common interests in mountain environments and climate change. They will also bring together and provoke interaction among a diverse group of scientific specialists in the earth, life and physical sciences who focus on the same environment in quite different ways. An additional outcome of the meeting will be a proceedings volume ("Treeline Environments of the Americas") that will summarize the information and discussion presented at the meeting. Participants of this proposal are from the following IAI countries: Argentina; Bolivia; Canada ; Chile; the United States; and Venezuela. These countries are Member States of the IAI, an initiative to stimulate cooperative research on global change issues in the Americas. The National Science Foundation is the designated U.S. Government to carry out U.S. responsibilities within the IAI. ***