Data from: High-elevation monsoon precipitation processes in the Central Andes of Peru

Silva, Yamina; Barros, Ana P.; Chavez, Steven

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Data from: High-elevation monsoon precipitation processes in the Central Andes of Peru

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Measurements at the high-elevation Lamar Observatory in the Mantaro Valley (MV) in the Central Andes of Peru demonstrate a diurnal cycle of precipitation characterized by convective rainfall during the afternoon and nighttime stratiform rainfall with embedded convection. Data from three wet seasons 2016-2018 reveal long-duration (6-12 hours) shallow precipitating systems (LDPS) that produced about 17% of monsoon rainfall in 2016 and 2018 associated with El Niño and La Niña respectively. The LPDS fraction of monsoon rainfall doubles to 35% with weekly recurrence in 2017 under El Niño Costero (coastal) conditions. Backward trajectory analysis shows that precipitable water sustaining > 80% of seasonal precipitation and LPDS originates in the western Amazon foothills and it is transported to higher elevation in 1-2 days. LDPS occur under favorable moisture conditions dictated by the South America Low Level Jet (SALLJ) and Cold Air Incursions (CAIs). High inter-annual variability of precipitation processes occurs with increased moisture supply in the mid troposphere due to higher frequency of CAIs during the 2017 El Niño Costero, with low-level advection from the eastern Andes foothills tied to SALLJ strength and enhanced moisture convergence ahead of CAI fronts. These findings highlight the role of eastern Andes in organizing the low-level moisture supply to high-elevation precipitation systems. Analysis of ground-based vis-à-vis the Global Precipitation Measurement (GPM) mission satellite-based radar observations points to significant challenges to precipitation detection and estimation measurement from space as the GPM clutter-free height (~2 km) exceeds the depth of precipitation systems in the MV (50% overall). ... [Read More]

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Data Citation

Chavez, S. P., Silva, Y., & Barros, A. P. (2020). Data from: High-elevation monsoon precipitation processes in the Central Andes of Peru. Duke Research Data Repository. https://doi.org/10.7924/r4n877f1k

Creator: Silva, Yamina
Barros, Ana P.
Chavez, Steven
DOI: 10.7924/r4n877f1k
Subject: Raingauge
Precipitation radar
Wind radar
Disdrometer
Andes
Publication Date: April 29, 2020
ARK: ark:/87924/r4n877f1k
Is Replaced By: 10.7924/r41n84j94
Affiliation: Civil and Environmental Engineering
Publisher: Duke Research Data Repository
Collection Dates: January 2016-March 2018
Language: English
Type: Dataset
Format: NetCDF
Contact: Steven Chavez: ORCID: 0000-0002-1591-0782
License: Creative Commons CC0 1.0 Universal
Title: Data from: High-elevation monsoon precipitation processes in the Central Andes of Peru
License: http://creativecommons.org/publicdomain/zero/1.0/
Repository: Duke Research Data Repository

Title	Date Uploaded		Actions
Parsivel2_DSD_10_2017.nc	2020-04-29	Public	Download
Parsivel2_DSD_11_2017.nc	2020-04-29	Public	Download
Rain_01_2016_03_2018.nc	2020-04-29	Public	Download

Versions

Version	DOI	Comment	Publication Date
2	10.7924/r41n84j94	Version 2 corrects the following in Rain_01_2016_03_2018.nc: the dimension for the hour field is updated to use a 2D matrix instead of a vector; the rain matrix is transposed for the rain field.	2020-07-21
1	10.7924/r4n877f1k		2020-04-29

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