GSTDTAP  > 地球科学
DOI10.1073/pnas.1815292116
Jet stream dynamics, hydroclimate, and fire in California from 1600 CE to present
Wahl, Eugene R.1; Zorita, Eduardo2; Trouet, Valerie3; Taylor, Alan H.4,5
2019
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2019
卷号116期号:12页码:5393-5398
文章类型Article
语种英语
国家USA; Germany
英文摘要

Moisture delivery in California is largely regulated by the strength and position of the North Pacific jet stream (NPJ), winter high-altitude winds that influence regional hydroclimate and forest fire during the following warm season. We use climate model simulations and paleoclimate data to reconstruct winter NPJ characteristics back to 1571 CE to identify the influence of NPJ behavior on moisture and forest fire extremes in California before and during the more recent period of fire suppression. Maximum zonal NPJ velocity is lower and northward shifted and has a larger latitudinal spread during presuppression dry and high-fire extremes. Conversely, maximum zonal NPJ is higher and southward shifted, with narrower latitudinal spread during wet and low-fire extremes. These NPJ, precipitation, and fire associations hold across pre-20th-century socioecological fire regimes, including Native American burning, postcontact disruption and native population decline, and intensification of forest use during the later 19th century. Precipitation extremes and NPJ behavior remain linked in the 20th and 21st centuries, but fire extremes become uncoupled due to fire suppression after 1900. Simulated future conditions in California include more wet-season moisture as rain (and less as snow), a longer fire season, and higher temperatures, leading to drier fire-season conditions independent of 21st-century precipitation changes. Assuming continuation of current fire management practices, thermodynamic warming is expected to override the dynamical influence of the NPJ on climate-fire relationships controlling fire extremes in California. Recent widespread fires in California in association with wet extremes may be early evidence of this change.


英文关键词jet stream precipitation fire California paleoclimatology
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000461679000035
WOS关键词CLIMATE-CHANGE ; ATMOSPHERIC RIVERS ; SIERRA-NEVADA ; REGIME SHIFTS ; WEST-COAST ; PRECIPITATION ; DROUGHT ; TEMPERATURE ; PACIFIC ; RECONSTRUCTION
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/205071
专题地球科学
资源环境科学
气候变化
作者单位1.NOAA, Ctr Weather & Climate, Natl Ctr Environm Informat, Boulder, CO 80301 USA;
2.Helmholz Zentrum Geesthacht, Inst Coastal Res, D-21502 Geesthacht, Germany;
3.Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA;
4.Penn State Univ, Dept Geog, University Pk, PA 16802 USA;
5.Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA
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GB/T 7714
Wahl, Eugene R.,Zorita, Eduardo,Trouet, Valerie,et al. Jet stream dynamics, hydroclimate, and fire in California from 1600 CE to present[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(12):5393-5398.
APA Wahl, Eugene R.,Zorita, Eduardo,Trouet, Valerie,&Taylor, Alan H..(2019).Jet stream dynamics, hydroclimate, and fire in California from 1600 CE to present.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(12),5393-5398.
MLA Wahl, Eugene R.,et al."Jet stream dynamics, hydroclimate, and fire in California from 1600 CE to present".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.12(2019):5393-5398.
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