The Utility of 1000 - 500 mb Thickness and Weather Type as a Rain-Snow Divide:  A 30-Year Study at Albany, NY

Hannigan, Allison C.; Godek, M. L.

doi:10.4236/acs.2020.103021

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Meteorologists commonly use the 5400-m line to determine whether a region is cold enough for snowfall or warm enough for rainfall. This line separates polar streams from mid-latitudes (Hannigan and Godek, 2020). Therefore, thickness maps provide a direct representation of the temperature within the corresponding layer.…”

Section: Methodsmentioning

confidence: 99%

The effects of climate warming on large-scale atmospheric systems of the Northern Hemisphere

Mahavarpour,

Khoshhal Dastjerdi,

Abolfazl Masoudian

et al. 2024

RICA

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In the present study, we examine the impact of climate warming on the variability of the main climatic drivers in the northern hemisphere, using 40 years (1979-2018) of ERA-Interim reanalysis data. We applied Sen’s slope estimator and the Mann-Kendall significance test to identify regions with significant variability of 500-1000 hPa thickness. The findings reveal that climate warming is particularly pronounced at latitudes ranging from 80º to 90º and also in subtropical regions. The increase in thickness is most notable in mid-latitudes during the summer season, owing to climate warming. The steeper trend slope observed in autumn indicates a faster warming rate compared to other seasons. Moreover, despite climate warming, significant trends in large-scale atmospheric circulation systems demonstrate the strengthening of the Siberian high-pressure in winter and autumn. Additionally, a segment of the core of the Azores high-pressure system has also experienced strengthening during winter. Conversely, the monsoon and Aleutian low-pressure systems have weakened in spring and winter, respectively. The subtropical high-pressure system exhibits a positive and significant trend in winter, spring, and summer, aligning with the positive significant trends observed in atmospheric thickness, thereby confirming the effects of climate warming.

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Section: Methodsmentioning

confidence: 99%

The effects of climate warming on large-scale atmospheric systems of the Northern Hemisphere

Mahavarpour,

Khoshhal Dastjerdi,

Abolfazl Masoudian

et al. 2024

RICA

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Analysis of Rain and Snow Weather Process in the Middle and East of China from December 28 to 30, 2020

Li¹

2023

GEP

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The China National Climate Center and National Centers for Environmental Prediction data were used in this work. Using the knowledge of synoptic principles and synoptic analysis, the rain and snow weather process in the middle and east of China from December 28 to 30, 2020 was analyzed. The results show that: 1) This weather process was a large-scale precipitation process. Affected by the cold wave, the temperature drops sharply, and the temperature in many places dropped below the extreme value, accompanied by strong winds. 2) This process is mainly caused by the eastward movement of the upper-level trough leading the cold air southward to intersect with the warm and wet air, and the shear thread in the lower layer cooperates. 3) The cold air is from the ocean east of Novaya Zemlya. 4) From the evolution trend of 500 hPa geopotential height field and ground pressure field, the cold surge process belongs to the type of transverse trough to vertical.

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The Utility of 1000 - 500 mb Thickness and Weather Type as a Rain-Snow Divide: A 30-Year Study at Albany, NY

Cited by 2 publications

References 6 publications

The effects of climate warming on large-scale atmospheric systems of the Northern Hemisphere

The effects of climate warming on large-scale atmospheric systems of the Northern Hemisphere

Analysis of Rain and Snow Weather Process in the Middle and East of China from December 28 to 30, 2020

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