DOI: 10.1111/gcb.14531
Scopus记录号: 2-s2.0-85058059993
论文题名: Projected changes in wind assistance under climate change for nocturnally migrating bird populations
作者: La Sorte F.A. ; Horton K.G. ; Nilsson C. ; Dokter A.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
卷: 25, 期: 2 起始页码: 589
结束页码: 601
语种: 英语
英文关键词: global climate change
; migration altitude
; nocturnal migration
; North America
; seasonal bird migration
; weather surveillance radar
; wind assistance
Scopus关键词: atmospheric circulation
; bird
; climate change
; climate modeling
; global change
; nocturnal activity
; population migration
; radar
; seasonality
; wind forcing
; United States
; Aves
英文摘要: Current climate models and observations indicate that atmospheric circulation is being affected by global climate change. To assess how these changes may affect nocturnally migrating bird populations, we need to determine how current patterns of wind assistance at migration altitudes will be enhanced or reduced under future atmospheric conditions. Here, we use information compiled from 143 weather surveillance radars stations within the contiguous United States to estimate the daily altitude, density, and direction of nocturnal migration during the spring and autumn. We intersected this information with wind projections to estimate how wind assistance is expected to change during this century at current migration altitudes. The prevailing westerlies at midlatitudes are projected to increase in strength during spring migration and decrease in strength to a lesser degree during autumn migration. Southerly winds will increase in strength across the continent during both spring and autumn migration, with the strongest gains occurring in the center of the continent. Wind assistance is projected to increase across the central (0.44 m/s; 10.1%) and eastern portions of the continent (0.32 m/s; 9.6%) during spring migration, and wind assistance is projected to decrease within the central (0.32 m/s; 19.3%) and eastern portions of the continent (0.17 m/s; 6.6%) during autumn migration. Thus, across a broad portion of the continent where migration intensity is greatest, the efficiency of nocturnal migration is projected to increase in the spring and decrease in the autumn, potentially affecting time and energy expenditures for many migratory bird species. These findings highlight the importance of placing climate change projections within a relevant ecological context informed through empirical observations, and the need to consider the possibility that climate change may generate both positive and negative implications for natural systems. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117515
Appears in Collections: 气候变化与战略
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Recommended Citation:
La Sorte F.A.,Horton K.G.,Nilsson C.,et al. Projected changes in wind assistance under climate change for nocturnally migrating bird populations[J]. Global Change Biology,2019-01-01,25(2)