DOI: 10.1002/jgrd.50247
论文题名: The radar tropopause above Svalbard 2008-2012: Characteristics at various timescales
作者: Hall C.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 6 起始页码: 2600
结束页码: 2608
语种: 英语
Scopus关键词: Altitude control
; Atmospheric temperature
; Clouds
; Radar
; Solar energy
; Stochastic systems
; Surface properties
; Upper atmosphere
; Causal relationships
; Constant altitude
; Radiosonde measurements
; Seasonal variation
; Surface temperature variation
; Surface temperatures
; Top-down control
; Troposphere warming
; Radar measurement
; atmospheric modeling
; data set
; radar
; seasonal variation
; solar cycle
; stratosphere
; surface temperature
; timescale
; tropopause
; warming
; Adventdalen
; Arctic
; Spitsbergen
; Svalbard
; Svalbard and Jan Mayen
英文摘要: [1] Determinations of the tropopause altitude over Adventdalen, Svalbard (78N, 16E) have been assembled for the period 2008-2012. These reveal characteristics at various timescales: interannual, seasonal, and stochastic. First, it is established that the inclusion of considerably more data does not alter earlier findings of good temporal agreement with radiosonde measurements, that the radar tropopause is located at a fairly constant altitude above the meteorological tropopause, and that the seasonal variation lags the surface temperature variation by approximately 1 month, indicating a degree of top-down control from the stratosphere. Over the longest timescale available, i.e., 5 years, we find an increase in tropopause altitude and identify this with increasing solar flux during the growth phase of solar cycle 24, and contrary to the seasonal variation, there is evidence that this is controlled by troposphere warming. At stochastic timescales, the scaling characteristics of the signal are examined, and in an exploratory investigation, the Hurst exponent is found to be ~0.82, which is in excellent agreement with independent findings for high latitude surface temperature data and therefore supportive of a complexity matching approach to identification of causal relationships between atmospheric metrics. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63851
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Tromsø Geophysical Observatory, University of Tromsø, Norway
Recommended Citation:
Hall C.M.. The radar tropopause above Svalbard 2008-2012: Characteristics at various timescales[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(6)