Direct near-surface measurements of sensible heat fluxes in the Arctic tundra applying eddy covariance and laser scintillometry—the Arctic Turbulence Experiment 2006 on Svalbard (ARCTEX-2006)

Direct near-surface measurements of sensible heat fluxes in the Arctic tundra applying eddy covariance and laser scintillometry—the Arctic Turbulence Experiment 2006 on Svalbard (ARCTEX-2006)
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应用涡流协方差和激光闪烁测量法对北极苔原敏感热通量进行直接近地表测量——2006 年斯瓦尔巴群岛北极湍流实验 (ARCTEX-2006)

DOI:
10.1007/s00704-011-0400-5
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发表时间:
2006
影响因子:
3.4
通讯作者:
J. Bareiss
J. Bareiss
中科院分区:
地球科学3区
文献类型:
--
作者:
Lüers;J. Bareiss

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最近北极的气候变暖需要改善永久冻土和碳循环监测,为此,需要建立长期观测站,并在北极景观中应用涡流协方差法和/或激光闪烁测量法对湍流大气能量通量进行高质量的原位测量。湍流能量通量的准确量化和适应性参数化,例如在中性到稳定分层条件下,是土壤-雪-冰-植被-大气相互作用研究中的一个基本问题。我们介绍 2006 年冬/春过渡期间在挪威斯瓦尔巴群岛进行的北极湍流实验 (ARCTEX-2006) 的结果,重点是数据校正和质量评估、天气条件以及特定地点的微气象特征。适应极地环​​境条件的质量评估和数据校正表明,可以最大限度地减少北极高地景观中常见的特定测量误差。我们讨论了动量和标量的大气湍流波动的间歇性的作用、靠近地表的受干扰的垂直温度剖面(急剧逆温层)的存在,以及斯瓦尔巴群岛北极春季雪或冰融化可能发生的自由对流事件的相关性。提出了有关涡流数据解释以及极地不同交换条件和(极端)天气情况下仪器布置的建议和改进。
Recent climate warming in the Arctic requires improvements in permafrost and carbon cycle monitoring, accomplished here by setting up long-term observation sites with high-quality in situ measurements of turbulent atmospheric energy fluxes applying the eddy covariance method and/or laser scintillometry in Arctic landscapes. Accurate quantification and well-adapted parameterizations of turbulent energy fluxes, e.g., during neutral to stable stratified conditions, are a fundamental problem in soil–snow–ice–vegetation–atmosphere interaction studies. We present results from the Arctic Turbulence Experiment (ARCTEX-2006) performed on the island of Svalbard, Norway, during the winter/spring transition 2006 that focus on data correction and quality assessment, on synoptic weather conditions, as well as site-specific micrometeorological features. A quality assessment and data correction adapted to the environmental conditions of polar regions demonstrates that specific measurement errors common at a high Arctic landscape could be minimized. We discuss the role of the intermittency of the turbulent atmospheric fluctuation of momentum and scalars, the existence of a disturbed vertical temperature profile (sharp inversion layer) close to the surface, and the relevance of possible free convection events for the snow or ice melt in the Arctic spring at Svalbard. Recommendations and improvements regarding the interpretation of eddy flux data as well as the arrangement of the instrumentation under polar distinct exchange conditions and (extreme) weather situations are presented.
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