Mass balance of two perennial snowfields: Niwot Ridge, Colorado, and the Ulaan Taiga, Mongolia

IF 1.6 4区 地球科学 Q4 ENVIRONMENTAL SCIENCES Arctic, Antarctic, and Alpine Research Pub Date : 2022-12-31 DOI:10.1080/15230430.2022.2027591
K. Williams, C. P. McKay, O. B. Toon, K. Jennings
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引用次数: 1

Abstract

ABSTRACT Perennial snowfields are generally receding worldwide, though the precise mechanisms causing recessions are not always well understood. Here we apply a numerical snowpack model to identify the leading factors controlling the mass balance of two perennial snowfields that have significant human interest: Arapaho Glacier, located at Niwot Ridge in the Colorado Rocky Mountains (United States), and a snowfield located in the Ulaan Taiga (Mongolia). The two locations were chosen because they differ in elevation, slope, and aspect. However, both have subarctic climates and are located within semi-arid regions. We show that for these two locations the snowfield mass balance is primarily sensitive to air temperature and wind speed, followed by precipitation and dust deposition amounts. The lack of sensitivity to dust deposition was most likely due to timing of deposition and the overall small dust amounts. We find that the sensitivities are similar for the center of the snowfield as well as the margins.
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两个多年生雪原的物质平衡:科罗拉多州的Niwot岭和蒙古的乌兰针叶林
在世界范围内,多年生雪原普遍在消退,尽管导致衰退的确切机制并不总是很好地理解。本文采用数值积雪模型来确定两个具有重要人类意义的多年生雪原的质量平衡的主要控制因子:位于美国科罗拉多州落基山脉Niwot岭的Arapaho冰川和位于蒙古乌兰针叶林的雪原。选择这两个地点是因为它们在海拔、坡度和立面上不同。然而,这两个国家都是亚北极气候,都位于半干旱地区。结果表明,这两个地点的积雪质量平衡主要受气温和风速的影响,其次是降水和降尘量。对粉尘沉积缺乏敏感性很可能是由于沉积的时间和总体粉尘量小。我们发现,雪原中心和边缘的敏感性是相似的。
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来源期刊
CiteScore
3.00
自引率
5.00%
发文量
37
审稿时长
7 months
期刊介绍: The mission of Arctic, Antarctic, and Alpine Research (AAAR) is to advance understanding of cold region environments by publishing original scientific research from past, present and future high-latitude and mountain regions. Rapid environmental change occurring in cold regions today highlights the global importance of this research. AAAR publishes peer-reviewed interdisciplinary papers including original research papers, short communications and review articles. Many of these papers synthesize a variety of disciplines including ecology, climatology, geomorphology, glaciology, hydrology, paleoceanography, biogeochemistry, and social science. Papers may be uni- or multidisciplinary but should have interdisciplinary appeal. Special thematic issues and proceedings are encouraged. The journal receives contributions from a diverse group of international authors from academia, government agencies, and land managers. In addition the journal publishes opinion pieces, book reviews and in memoria. AAAR is associated with the Institute of Arctic and Alpine Research (INSTAAR) the oldest active research institute at the University of Colorado Boulder.
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