Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling
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使用 InSAR 测量东西伯利亚 Mayya 附近森林火灾后的地表位移：观测及其对地球物理模型的影响
DOI：
10.1029/2022ea002476
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发表时间：
2022
影响因子：
3.1
通讯作者：
Iijima, Yoshihiro
中科院分区：
文献类型：
--
作者：
Abe, Takahiro;Iwahana, Go;Tadono, Takeo;Iijima, Yoshihiro
森林火灾严重影响亚北极地区的永久冻土退化。然而，年际和季节变化的地表变形，由于多年冻土融化在烧毁的地区知之甚少。测量火痕中的地表位移有助于我们了解近地表的冻融动力学并预测未来状态，特别是在富含冰的永久冻土地区。这项研究使用L和C波段干涉合成孔径雷达技术，揭示了2013年在东西伯利亚萨哈共和国Mayya附近燃烧的火痕的年际沉降和季节性融化沉降/冻胀。我们发现，2014年至2020年期间的累计沉降量高达7厘米，其中大部分发生在2016年。火灾后2017年至2020年，季节性融沉和冻胀的大小每年都有变化，但冻胀的年际变化与2017年至2020年融季降水的时间变化相对应。这表明，在解冻季节的降水量与沉积物中的离析-冰形成的大小有关，这决定了冻胀量。观测到的季节性位移不能用Stefan方程推导的模型和与冰水相变相关的体积变化来定量解释。这意味着，其他模型与隔离冰（冰透镜）的形成/融化需要解释所观察到的季节性位移。
Forest fires significantly impact permafrost degradation in the subarctic regions. However, interannual and seasonal variations in surface deformation due to permafrost thawing in burned areas were poorly understood. Measuring the ground surface displacement in fire scars helps us understand the freeze‐thaw dynamics of near‐surface ground and predict the future state, particularly in ice‐rich permafrost regions. This study used the L‐ and C‐band interferometric synthetic aperture radar technique to reveal interannual subsidence and seasonal thaw settlement/frost heave in a fire scar near Mayya, Sakha Republic in Eastern Siberia burned in 2013. We found that the cumulative subsidence was up to 7 cm between 2014 and 2020, most of which had occurred by 2016. The magnitude of seasonal thaw settlement and frost heave varied each year from 2017 to 2020 after the fire, but the interannual change in frost heave corresponded to the temporal variation in precipitation during the thawing season from 2017 to 2020. This suggests that the precipitation amount during the thawing season is related to the magnitude of segregation‐ice formation in the sediments, which determines the frost heave amount. The observed seasonal displacements could not be quantitatively explained by models inferred from the Stefan's equation and volume changes associated with ice‐water phase change. This implies that other models associated with segregated ice (ice lens) formation/thaw are required to explain the observed seasonal displacement.
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永久冻土-森林动力学
DOI：
--
发表时间：
2019
期刊：
Ecological Studies
影响因子：
--
作者：
Y. Iijima;A. Fedorov
通讯作者：
A. Fedorov
影响因子：
5
作者：
M. Ulrich;G. Grosse;J. Strauss;Lutz Schirrmeister
通讯作者：
M. Ulrich;G. Grosse;J. Strauss;Lutz Schirrmeister
西伯利亚北部耶多马景观的解冻沉降，现场测量并通过 TerraSAR-X 干涉测量进行估算
DOI：
10.3390/rs10040494
发表时间：
2018
期刊：
Remote. Sens.
影响因子：
--
作者：
S. Antonova;H. Sudhaus;T. Strozzi;S. Zwieback;A. Kääb;B. Heim;M. Langer;Niko Bornemann;J. Boike
通讯作者：
J. Boike
影响因子：
--
作者：
K. Yoshikawa;W. Bolton;V. Romanovsky;M. Fukuda;L. Hinzman
通讯作者：
K. Yoshikawa;W. Bolton;V. Romanovsky;M. Fukuda;L. Hinzman
雅库特中部永久冻土相关湖泊的行为和分布差异及其对气候驱动因素的响应
影响因子：
5.4
作者：
Ulrich;Matthes;Schirrmeister;Schütze;Iijima;Fedorov
通讯作者：
Fedorov