Continued Investigations of the Structure, Evolution, and Life Cycles of Intraseasonal Fluctuations of the North Pacific Jet Stream
Continued Investigations of the Structure, Evolution, and Life Cycles of Intraseasonal Fluctuations of the North Pacific Jet Stream
批准号:
2055667
负责人:
Jonathan Martin
金额:
$84.69万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2021
资助国家:
美国
项目状态:
已结题
起止时间:
2021-08-01 至 2024-07-31
中文摘要
北太平洋上空的急流对越洋登陆美国和加拿大海岸的冬季风暴过程施加了控制作用。急流作为风暴传送带的作用使其成为天气预报员感兴趣的话题,因为风暴的路径和强度对各种形式的急流变化很敏感,包括扩展、收缩和南北弯曲。也许更重要的是,喷气机的变化可以影响连续的风暴,因此喷气机波动的影响超出了典型的五天预测,进入了亚季节预测的领域。但是,太平洋急流变化的潜在动力尚未得到很好的理解,有关机制的基本问题仍然存在。太平洋扇区的不同寻常之处在于,它结合了中纬度急流动力学,其特点是急流与沿其移动的天气模式之间的相互作用,以及来自西太平洋温暖水域上空深层对流区域的低纬度影响。在早期的工作中,一位首席研究员使用线性逆模式(LIM)来确定热带影响与中纬度动力相互作用从而产生高层环流异常的机制。在本工作中,LIM分析被应用于理解使用自组织图(SOMs)识别的射流波动。工作的重点是从一种喷射状态过渡到另一种状态的动力学,以及这种过渡对下游天气的影响。如上所述,这项工作与北美天气有关,与长期预报有关,因此具有社会和科学意义。此外,ppi还参与公共宣传活动,包括威斯康星州公共广播电台每月一期的节目。该项目还为两名研究生和两名本科生暑期实习生提供支持和培训。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
英文摘要
The jet stream over the North Pacific exerts a controlling influence on the procession of winter storms that cross the ocean to make landfall on the US and Canadian coasts. The role of the jet as a conveyor of storms makes it a topic of interest for weather forecasters as the paths and intensities of the storms are sensitive to the various forms of jet variability including extension, retraction and north-south meandering. Perhaps more importantly, jet variations can affect a succession of storms, so the influence of jet fluctuations extends beyond the typical five-day forecast and into the domain of subseasonal prediction. But the underlying dynamics of Pacific jet variations are not well understood and fundamental questions remain as to the mechanisms involved.The Pacific sector is unusual in its combination of middle-latitude jet dynamics, featuring the interplay between the jet and the weather patterns that move along it, and low-latitude influences from the region of deep convection over the warm waters of the western Pacfic. In earlier work one of the Principal Investigators (PIs) used a Linear Inverse Model (LIM) to identify a mechanism through which tropical influences interact with middle-latitude dynamics to produce upper-level circulation anomalies. In the present work the LIM analysis is applied to understand jet fluctuations identified using Self-Organizing Maps (SOMs). The work focuses on the dynamics of transitions from one jet state to another and the consequences of the transitions for downstream weather.The work is of societal as well as scientific interest given its connection to North American weather and relevance to long-range forecasting, as noted above. In addition, the PIs engage in public outreach including a monthly show on Wisconsin Public Radio. The project also provides support and training for two graduate students and two undergraduate summer interns.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
期刊论文(2)
专著(0)
科研奖励(0)
会议论文
A self organizing maps analysis of north Pacific jet variability
北太平洋急流变化的自组织地图分析
DOI:
--
发表时间:
2023
期刊:
Journal of climate
影响因子:
4.9
作者:
[Madsen, Maria M., Martin, Jonathan E.]
通讯作者:
Martin, Jonathan E.
A self-organizing maps analysis of wintertime North Pacific jet stream variability
冬季北太平洋急流变化的自组织地图分析
DOI:
--
发表时间:
2023
期刊:
Journal of climate
影响因子:
4.9
作者:
[Madsen, Maria M., Martin, Jonathan E.]
通讯作者:
Martin, Jonathan E.
Sensitivity of Hurricane Intensity Change to Outflow Interactions with the Environment
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批准号:2114620
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项目类别:Standard Grant
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资助金额:$117.08万
-
财政年份:2021
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负责人:Jonathan Martin
-
依托单位:
The Structure, Evolution, Dynamics and Cloud and Precipitation Characteristics of Extreme Summer Arctic Cyclones Revealed Through Comprehensive Life Cycle Studies
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批准号:1951757
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项目类别:Standard Grant
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资助金额:$52.19万
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财政年份:2020
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负责人:Jonathan Martin
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依托单位:
Significance of Ice-loss to Landscapes in the Arctic: SILA (Inuit concept of the physical world and weather)
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批准号:2000649
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项目类别:Standard Grant
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资助金额:$224.5万
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财政年份:2020
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负责人:Jonathan Martin
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依托单位:
Diagnosis of the Sensitivity of Type B Cyclones to the Structure and Evolution of Their Upper-Tropospheric Precursors
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批准号:1851152
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项目类别:Standard Grant
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资助金额:$86.1万
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财政年份:2019
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负责人:Jonathan Martin
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依托单位:
CZ RCN: Research Coordination in Carbonate Critical Zones
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批准号:1905259
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项目类别:Standard Grant
-
资助金额:$49.91万
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财政年份:2019
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负责人:Jonathan Martin
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依托单位:
Collaborative Research: How does groundwater inundation of carbonate island interiors from sea level rise impact surface water-aquifer interactions and evaporative losses?
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批准号:1743355
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项目类别:Continuing Grant
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资助金额:$19.21万
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财政年份:2018
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负责人:Jonathan Martin
-
依托单位:
Collaborative Research: Geophysical characterization of a karst aquifer using dynamic recharge events
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批准号:1740481
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项目类别:Standard Grant
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资助金额:$3.34万
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财政年份:2018
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负责人:Jonathan Martin
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依托单位:
Collaborative Research: Does calcification by paleoceanographically relevant benthic foraminifera provide a record of localized methane seepage?
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批准号:1634248
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项目类别:Standard Grant
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资助金额:$8.59万
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财政年份:2016
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负责人:Jonathan Martin
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依托单位:
Weathering of western Greenland: Influences on oceanic fluxes of radiogenic isotopes
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批准号:1203773
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项目类别:Standard Grant
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资助金额:$48.44万
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财政年份:2013
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负责人:Jonathan Martin
-
依托单位:
The Structure, Evolution, and Life Cycles of Intraseasonal Fluctuations of the North Pacific Jet Stream
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批准号:1265182
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项目类别:Standard Grant
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资助金额:$64.47万
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财政年份:2013
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负责人:Jonathan Martin
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依托单位:
Coastal SEES (Track 1): Planning for hydrologic and ecological impacts of sea level rise on sustainability of coastal water resources
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批准号:1325227
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项目类别:Standard Grant
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资助金额:$44.11万
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财政年份:2013
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负责人:Jonathan Martin
-
依托单位:
A Reappraisal of Petterssen's Type A and Type B Cyclogenesis - A Dynamical Process Study
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批准号:0950349
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项目类别:Continuing Grant
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资助金额:$58.19万
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财政年份:2010
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负责人:Jonathan Martin
-
依托单位:
Reversals of karst springs: Implications for water budgets, water quality, and speleogenesis
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批准号:0910794
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项目类别:Standard Grant
-
资助金额:$38.5万
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财政年份:2009
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负责人:Jonathan Martin
-
依托单位:
Studies of the Structure, Evolution and Dynamics of Lower Stratospheric Frontal Zones Associated with Upper-level Jet/Front Systems and their Influence on Tropopause Deformation
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批准号:0806430
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项目类别:Continuing Grant
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资助金额:$31.44万
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财政年份:2008
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负责人:Jonathan Martin
-
依托单位:
Collaborative research: interdisciplinary approach to understand stable isotopic disequilibrium in benthic foraminifera
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批准号:0550396
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项目类别:Continuing Grant
-
资助金额:$12.9万
-
财政年份:2007
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负责人:Jonathan Martin
-
依托单位:
Collaborative Research: Testing the Impact of Seasonality on Benthic Foraminifers as Paleoenvironmental Proxies.
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批准号:0635870
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项目类别:Standard Grant
-
资助金额:$15.18万
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财政年份:2007
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负责人:Jonathan Martin
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依托单位:
Future Directions in Karst Research: A Workshop Proposal
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批准号:0608945
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项目类别:Standard Grant
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资助金额:$2.34万
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财政年份:2006
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负责人:Jonathan Martin
-
依托单位:
Continued Studies of the Structure, Evolution, and Energetics of Subtropical Cyclones in the Northern Pacific and Atlantic Ocean Basins
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批准号:0452318
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项目类别:Standard Grant
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资助金额:$37.41万
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财政年份:2005
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负责人:Jonathan Martin
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依托单位:
Integrated Physical and Chemical Observations of Water-rock Interactions and Coupled Matrix-conduit Flow in the Karstic Floridan Aquifer
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批准号:0510054
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项目类别:Continuing Grant
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资助金额:$32.2万
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财政年份:2005
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负责人:Jonathan Martin
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依托单位:
Collaborative Research: Are Carbon Fluxes from Marine Sediments Enhanced by Submarine Ground Water Discharge?
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批准号:0403461
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项目类别:Standard Grant
-
资助金额:$0.0万
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财政年份:2004
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负责人:Jonathan Martin
-
依托单位:
海外基金