Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1017/S0954102021000341 |
| Episodic basin-scale soil moisture anomalies associated with high relative humidity events in the McMurdo Dry Valleys, Antarctica | |
| Levy, Joseph | |
| 通讯作者 | Levy, J (corresponding author), Colgate Univ, Dept Geol, Hamilton, NY 13346 USA. |
| 来源期刊 | ANTARCTIC SCIENCE
 |
| ISSN | 0954-1020 |
| EISSN | 1365-2079 |
| 出版年 | 2021 |
| 卷号 | 33期号:5页码:533-547 |
| 英文摘要 | Outside of hydrologically wetted active layer soils and humidity-sensitive soil brines, low soil moisture is a limiting factor controlling biogeochemical processes in the McMurdo Dry Valleys. But anecdotal field observations suggest that episodic wetting and darkening of surface soils in the absence of snowmelt occurs during high humidity conditions. Here, I analyse long-term meteorological station data to determine whether soil-darkening episodes are present in the instrumental record and whether they are, in fact, correlated with relative humidity. A strong linear correlation is found between relative humidity and soil reflectance at the Lake Bonney long-term autonomous weather station. Soil reflectance is found to decrease annually by a median of 27.7% in response to high humidity conditions. This magnitude of darkening is consistent with soil moisture rising from typical background values of < 0.5 wt.% to 2-3 wt.%, suggesting that regional atmospheric processes may result in widespread soil moisture generation in otherwise dry surface soils. Temperature and relative humidity conditions under which darkening is observed occur for hundreds of hours per year, but are dominated by episodes occurring between midnight and 07h00 local time, suggesting that wetting events may be common, but are not widely observed during typical diel science operations. |
| 英文关键词 | deliquescence hydrology microclimate micrometeorology pedology remote sensing |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000721331200009 |
| WOS关键词 | TAYLOR VALLEY ; CO2 FLUX ; WATER ; PERMAFROST ; DESERT ; SEEPS ; SNOW |
| WOS类目 | Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/373653 |
| 作者单位 | [Levy, Joseph] Colgate Univ, Dept Geol, Hamilton, NY 13346 USA |
| 推荐引用方式 GB/T 7714 | Levy, Joseph. Episodic basin-scale soil moisture anomalies associated with high relative humidity events in the McMurdo Dry Valleys, Antarctica[J],2021,33(5):533-547. |
| APA | Levy, Joseph.(2021).Episodic basin-scale soil moisture anomalies associated with high relative humidity events in the McMurdo Dry Valleys, Antarctica.ANTARCTIC SCIENCE,33(5),533-547. |
| MLA | Levy, Joseph."Episodic basin-scale soil moisture anomalies associated with high relative humidity events in the McMurdo Dry Valleys, Antarctica".ANTARCTIC SCIENCE 33.5(2021):533-547. |
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