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GENERAL INFORMATION
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1. Title of Dataset: Discriminators of Antarctic Atmospheric River Environments

2. Authors: Baiman, Rebecca

3. Contact information: Rebecca.baiman@colorado.edu

4. Date of data collection: 08/17/2023

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SHARING/ACCESS INFORMATION
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1. Licenses/restrictions placed on the data: No restrictions

2. Links to publications that cite or use the data: Baiman et al (2023 to be submitted to Nature Communications: Earth and Environment)

3. Links to other publicly accessible locations of the data:

4. Recommended citation for the data: Baiman, R. (2023). Discriminators of Antarctic Atmospheric River Environments [Data set]. University of Colorado Boulder. 

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DATA & FILE OVERVIEW
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Filename: discriminators_ARs_data.csv

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METHODOLOGICAL INFORMATION
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The dates and time steps of atmospheric rivers making landfall over Antarctica between between 1980 and 2019 are listed in the column “AR times”. The corresponding analog timestep (timestep with the closest matching 500 Geopotential heigh anomaly curve at 55 degrees south but not featuring an AR) is listed under “Analog times”. The center of the AR and subsequently the center of the synoptic-scale environment at 55 degrees south for each AR and Analog tilmestep is listed under “Centers at 55s”. The snowfall intensity attributable to each AR timestep, determined by the sum of snowfall in Gt/hr over the ice sheet and ice shelves in an 80 degree longitude window around the “Centers at 55s”, is listed under “AR precip (Gt/hr)”. The same methodology is used for each Analog tilmestep and listed under “Analog precip (Gt/he)”. The last column, named “Top AR” is 1 for the subset of ARs in the top ten percent (1,742 time steps) of precipitation attributable. Please refer to Baiman et al (2023) for a complete methodology of this datasets. 

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DATA-SPECIFIC INFORMATION FOR: discriminators_ARs_data.csv
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1. Number of variables: 5

2. Number of cases/rows: 17418

3. Variable List:
	A. Name: AR times
	   Description: time steps in which atmospheric rivers make landfall over Antarctica, 1980-2019. The format of the date is YYYY-MM-DD HH:MM:SS.The time is in UTC.

	B. Name: Analog times
	   Description: time steps with no AR but the closest matching synoptic-scale environment to time steps in which atmospheric rivers make landfall over Antarctica, 1980-2019. The format of the date is YYYY-MM-DD HH:MM:SS.The time is in UTC.
	
	C. Name: Centers at 55s
	   Description: Longitude at center of AR at 55s latitude

	D. Name: AR precip
	   Description: Snowfall intensity attributable to each AR timestep. 
	
	E. Name: Analog precip
	   Description: Snowfall intensity attributable to each Analog timestep. 

4. Data codes (e.g., N/A = Not applicable):