谢永坤 Yongkun XIE

谢永坤 Yongkun XIE

A research scholar specializing in climate dynamics and climate change, with a focus spanning regional to global scales.

Posts by Collection

publications

Dryland climate change: Recent progress and challenges

Published in Reviews of Geophysics, 2017

Recommended citation: Huang J, Li Y, Fu C, Chen F, Fu Q, Dai A, Shinoda M, Ma Z, Guo W, Li Z, Zhang L, Liu Y, Yu H, He Y, Xie Y, et al. (2017) Dryland climate change: Recent progress and challenges. Reviews of Geophysics, 55, 719–778
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The influence of precipitation phase changes on the recharge process of terrestrial water storage in the cold season over the Tibetan Plateau

Published in Journal of Geophysical Research: Atmospheres, 127, 2022

Recommended citation: Wang G, He Y, Huang J, Guan X, Wang X, Hu H, Wang S, Xie Y. (2022) The influence of precipitation phase changes on the recharge process of terrestrial water storage in the cold season over the Tibetan Plateau. Journal of Geophysical Research: Atmospheres, 127, e2021JD035824.
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talks

Eurasian cooling linked with Arctic warming

发布时间：

  1. Eurasian cooling is large at both surface and middle troposphere
  2. PV view of the three-dimensional linkages between cooling and warming
  3. Spatial pattern & vertical structure of Arctic warming, climatological PV distribution are crucial factors

海洋中继器促进了青藏高原热源的全球气候效应

发布时间：

  1. 揭示青藏高原热源对现代全球气候的影响
    （以往研究多关注古气候、亚洲季风区、未区分机械和热力效应，且无多模式验证）
  2. 阐明太平洋和大西洋的海洋中继器效应
    （热量和水汽输送、大气环流途径、局地海-气反馈）

亚洲强化增温加剧了北极放大效应

发布时间：

  1. 发现了一个影响北极放大的新因素
  2. 揭示了亚洲强化增温对北极的影响
  3. 拓展了青藏高原对全球气候的影响
    （大气动力机制、海-气相互作用、海洋电容器效应）

海-气相互作用促进了青藏高原热源的全球气候效应

发布时间：

  1. 揭示青藏高原热源对现代全球气候的影响
    （以往研究多关注古气候、亚洲季风区、未区分机械和热力效应，且无多模式验证）
  2. 阐明太平洋和大西洋的海洋中继器效应
    （热量和水汽输送、大气环流途径、局地海-气反馈）
  3. 揭示青藏高原对北极的影响
    （大气动力机制、海-气相互作用、海洋电容器效应）

Oceanic Repeaters Boost the Global Climatic Impact of the Tibetan Plateau

发布时间：

  1. The impact of TP heating on current climate
    (Previous studies focused on paleoclimate, Asian monsoon, without disentangling mechanical and thermal effects, and no multimodel comparison)
  2. Pacific and Atlantic oceanic repeaters
    (Heat and moisture transport, atmospheric circulation, and local air-sea interactions)

海-气相互作用促进了青藏高原热源的全球气候效应

发布时间：

  1. 揭示青藏高原热源对现代全球气候的影响
    （以往研究多关注古气候、亚洲季风区、未区分机械和热力效应，且无多模式验证）
  2. 阐明太平洋和大西洋的海洋中继器效应
    （热量和水汽输送、大气环流途径、局地海-气反馈）
  3. 揭示青藏高原对北极的影响
    （大气动力机制、海-气相互作用、海洋电容器效应）

海-气相互作用促进了青藏高原热源的全球气候效应

发布时间：

  1. 揭示青藏高原热源对现代全球气候的影响
    （以往研究多关注古气候、亚洲季风区、未区分机械和热力效应，且无多模式验证）
  2. 阐明太平洋和大西洋的海洋中继器效应
    （热量和水汽输送、大气环流途径、局地海-气反馈）
  3. 揭示青藏高原对北极的影响
    （大气动力机制、海-气相互作用、海洋电容器效应）

亚洲强化增温加剧了北极放大

发布时间：

  1. 发现了一个影响北极放大的新因素
  2. 揭示了亚洲强化增温对北极的影响
    （大气动力机制、海-气相互作用、海洋电容器效应）
  3. 拓展了青藏高原对全球气候的影响

Oceanic Repeaters Boost the Global Climatic Impact of the Tibetan Plateau

发布时间：

  1. The impact of TP heating on modern global climate
    (Previous studies focused on paleoclimate, Asian monsoon, without disentangling mechanical and thermal effects, and no multimodel comparison)
  2. Pacific and Atlantic oceanic repeaters
    (Heat and moisture transport, atmospheric circulation, and local air-sea interactions)
  3. The influence of TP warming on Arctic amplification
    (Atmospheric dynamics, air-sea interactions, and capacitor effect of the Arctic Ocean)

Oceanic Repeaters Boost the Global Climatic Impact of the Tibetan Plateau

发布时间：

ABSTRACT
The topography of the Tibetan Plateau (TP) has shaped the paleoclimatic evolution of the Asian monsoon. However, the influence of the TP on the global climate, beyond the domain of the Asian monsoon, remains unclear. Here we show that the Pacific, Atlantic, and Arctic Oceans act as efficient repeaters that boost the global climatic impact of the TP. The simulations demonstrate that oceanic repeaters enable TP heating to induce a wide-ranging climate response across the globe. A 1 °C TP warming can result in a 0.73 °C temperature increase over North America. Oceanic repeaters exert their influence by enhancing the air-sea interaction-mediated horizontal heat and moisture transport, as well as relevant atmospheric circulation pathways including westerlies, stationary waves, and zonal-vertical cells. Air-sea interactions were further tied to local feedbacks over the North Pacific, North Atlantic, and Arctic Oceans. Our findings highlight the crucial influence of TP heating variation on the current climate under a quasi-fixed topography, in contrast to topography change previously studied in paleoclimate evolution. Therefore, TP heating should be considered in research on global climate change.
Keywords: Tibetan Plateau, oceanic repeater, global climate, air-sea interactions, Pacific and Atlantic Oceans, Arctic

Multi-layered Interactions Underlying Arctic Amplification and Its Impact

发布时间：

ABSTRACT
This presentation will discuss the multi-layered interactions between the atmosphere, ocean, and sea ice to explore the mechanics of Arctic amplification and its effects on mid-latitudes. The main aspects encompass the factors contributing to Arctic amplification from an energy budget perspective, the two-way connections between the Arctic and mid-latitude regions based on a dynamic and thermodynamic coupling perspective, and the general mechanisms by which the Arctic or oceans influence distant land areas from a potential vorticity perspective.
Keywords: Arctic Amplification, Multi-layered Interactions, Mid-latitudes, Atmospheric Dynamics, Potential Vorticity

青藏高原热源的全球气候效应

发布时间：

  1. 揭示青藏高原热源对现代全球气候的影响 (以往研究多关注古气候、亚洲季风区、未区分机械和热力效应，且无多模式验证)
  2. 阐明太平洋和大西洋的海洋中继器效应 (热量和水汽输送、大气环流途径、局地海-气反馈)
  3. 发现青藏高原对北极的影响 (大气动力机制、海-气相互作用、海洋电容器效应)

Oceanic Repeaters Boost the Global Climatic Impact of the Tibetan Plateau

发布时间：

  1. The impact of TP heating on modern global climate (Previous studies focused on paleoclimate, Asian monsoon, without disentangling
    mechanical and thermal effects, and no multimodel comparison)
  2. Pacific and Atlantic oceanic repeaters (Heat and moisture transport, atmospheric circulation, and local air-sea interactions)
  3. The influence of TP warming on Arctic amplification (Atmospheric dynamics, air-sea interactions, and capacitor effect of the Arctic Ocean)

亚洲高山的强化增温造成北半球天气的变化

发布时间：

亚洲高山地区，常被称为地球的“第三极”，是全球变暖背景下一个至关重要的热点区域。然而，亚洲高山地区的强化增温对人口密集的北半球天气格局的影响目前仍未得到充分理解。基于观测和数值试验，我们证明了在1940年至2022年期间的夏季，亚洲高山地区的变暖使俄罗斯和加拿大的天气尺度温度变率（衡量天气波动的一个关键指标）显著增加了20%以上。相反，在冬季，它使北欧海和东欧地区的天气波动减弱了16%以上。造成这些天气波动变化的主要驱动因素是由亚洲高山地区变暖所引发的区域变暖差异，这种差异调节了高频水平温度平流。除东欧地区外，这一机制在大多数地区都起主导作用，而在东欧，高频大气环流变率则发挥着更为重要的作用。此外，亚洲高山地区变暖对遥远地区的变暖模态和环流变率的遥相关影响，与罗斯贝波和垂直环流圈有关。我们的研究结果表明，除了已被广泛认识的亚洲高山地区变暖对“第三极”局地环境的影响之外，亚洲高山地区的强化增温还对整个北半球的天气格局产生了至关重要的遥相关影响。

亚洲高山区的强化增温调控北半球的天气变化

发布时间：

亚洲高山地区（HMA）是全球变暖背景下的关键热点区域。然而，这一地区显著的增温效应如何影响北半球极端天气相关的天气尺度温度变率（STV）仍不明确。基于观测数据和数值模拟实验，我们发现1940-2022年间，HMA增温放大效应使加拿大和俄罗斯夏季STV增加，却使东欧和北欧海冬季STV降低超16%，其主控机制为高频水平温度平流过程的改变。HMA通过同时改变温度梯度和高频大气环流变率共同调控平流过程：夏季该效应强化了加拿大和俄罗斯的区域温度梯度，冬季则削弱了北欧海的温度梯度。除东欧外，这种温度梯度主导机制在多数区域成立——该地区STV的减弱主要源于HMA增温引起的天气尺度环流变率降低。这些模式本质上源于HMA增温通过急流、罗斯贝波变化引发的大气反馈与海气相互作用，进而对半球尺度温度分布和环流稳定性产生的遥相关影响。本研究揭示，HMA放大增温效应不仅以”第三极”环境变化著称，更对北半球天气型态具有重大遥相关影响。

teaching

Meteorology of the Tibetan Plateau

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2022

The course focuses on theoretical frameworks and computational simulations to analyze the climate effects of the Tibetan Plateau.

Meteorology of the Tibetan Plateau

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2024

The course focuses on theoretical frameworks and computational simulations to analyze the climate effects of the Tibetan Plateau.

Climate and Climate System

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2024

The course primarily examines Earth’s climate dynamics and the complex interactions within the multi-sphere climate system (including atmosphere, hydrosphere, cryosphere, biosphere, and lithosphere).

Introduction to Earth System Science

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2024

The course provides a comprehensive introduction to the Earth System, covering its key components, interactions, and dynamics.​

Meteorology of the Tibetan Plateau

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2025

The course focuses on theoretical frameworks and computational simulations to analyze the climate effects of the Tibetan Plateau.

Climate and Climate System

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2025

The course primarily examines Earth’s climate dynamics and the complex interactions within the multi-sphere climate system (including atmosphere, hydrosphere, cryosphere, biosphere, and lithosphere).

Introduction to Earth System Science

Graduate course, Lanzhou University, College of Atmospheric Sciences, 2025

The course provides a comprehensive introduction to the Earth System, covering its key components, interactions, and dynamics.​