Climate change in North Patagonian Andes: temperature and precipitation patterns

This study analyzes climate change in the North Patagonian Andes (NPA), focusing on temperature and precipitation trends in the last three decades. Data were collected from 12 key meteorological stations to assess changes in mean annual temperatures and precipitation patterns. Precipitation characte...

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Detalles Bibliográficos
Autor principal: Martyniuk, Nicolás
Formato: conjunto de datos other acceptedVersion
Lenguaje:en_US
Publicado: Universidad Nacional del Comahue. Centro Regional Universitario Bariloche 2024
Materias:
Temperature anomaly
SPI
Latitudinal transect
Manso
SAM
Positive phase
Ciencias de la Tierra y Medio Ambiente
Acceso en línea:http://rdi.uncoma.edu.ar/handle/uncomaid/18107
Aporte de:
Repositorio Institucional UNCo de Universidad Nacional del Comahue
id I22-R178-uncomaid-18107
record_format dspace
spelling I22-R178-uncomaid-181072024-08-30T13:11:36Z Climate change in North Patagonian Andes: temperature and precipitation patterns Martyniuk, Nicolás Temperature anomaly SPI Latitudinal transect Manso SAM Positive phase Ciencias de la Tierra y Medio Ambiente This study analyzes climate change in the North Patagonian Andes (NPA), focusing on temperature and precipitation trends in the last three decades. Data were collected from 12 key meteorological stations to assess changes in mean annual temperatures and precipitation patterns. Precipitation characterization was analyzed in two 100 km West-East transects: La Angostura and Manso latitudinal transects. A consistent warming trend was identified in all stations, particularly at the Alerce station in the NPA, where temperatures increased by 0.82°C per decade since 1993. This warming trend was further emphasized by a steeper increase in the mean temperature trend starting in 2007, along with a rise in temperature anomalies and more frequent hot weather events. Additionally, there is a significant negative trend in both transects in the standardized precipitation index, with moderate and severe droughts becoming more common since 2016. Precipitation trends revealed a notable decline since 2007, especially in the Manso transect which was more affected by the westward retraction of precipitation isohyets in the last 5 years (2016-2021). These results indicate that the positive phase of the Southern Annular Mode (SAM), associated with a poleward movement of storm tracks, has contributed to warmer and drier conditions across much of NPA. The observed climate changes have significant implications for regional hydrology and ecosystem dynamics. These findings underscore the importance of monitoring and understanding the intricate relationships between atmospheric circulation patterns and local climate dynamics in the face of ongoing climate change. Fil: Martyniuk, Nicolás. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Martyniuk, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. 2024-08-28 2024-08-30T13:06:58Z 2024-08-30T13:06:58Z conjunto de datos other acceptedVersion http://rdi.uncoma.edu.ar/handle/uncomaid/18107 en_US Atribución-NoComercial-CompartirIgual 2.5 Argentina https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ application/ms-excel Tabla de Datos application/vnd.openxmlformats-officedocument.spreadsheetml.sheet Universidad Nacional del Comahue. Centro Regional Universitario Bariloche
institution Universidad Nacional del Comahue
institution_str I-22
repository_str R-178
collection Repositorio Institucional UNCo
language en_US
topic Temperature anomaly
SPI
Latitudinal transect
Manso
SAM
Positive phase
Ciencias de la Tierra y Medio Ambiente
spellingShingle Temperature anomaly
SPI
Latitudinal transect
Manso
SAM
Positive phase
Ciencias de la Tierra y Medio Ambiente
Martyniuk, Nicolás
Climate change in North Patagonian Andes: temperature and precipitation patterns
topic_facet Temperature anomaly
SPI
Latitudinal transect
Manso
SAM
Positive phase
Ciencias de la Tierra y Medio Ambiente
description This study analyzes climate change in the North Patagonian Andes (NPA), focusing on temperature and precipitation trends in the last three decades. Data were collected from 12 key meteorological stations to assess changes in mean annual temperatures and precipitation patterns. Precipitation characterization was analyzed in two 100 km West-East transects: La Angostura and Manso latitudinal transects. A consistent warming trend was identified in all stations, particularly at the Alerce station in the NPA, where temperatures increased by 0.82°C per decade since 1993. This warming trend was further emphasized by a steeper increase in the mean temperature trend starting in 2007, along with a rise in temperature anomalies and more frequent hot weather events. Additionally, there is a significant negative trend in both transects in the standardized precipitation index, with moderate and severe droughts becoming more common since 2016. Precipitation trends revealed a notable decline since 2007, especially in the Manso transect which was more affected by the westward retraction of precipitation isohyets in the last 5 years (2016-2021). These results indicate that the positive phase of the Southern Annular Mode (SAM), associated with a poleward movement of storm tracks, has contributed to warmer and drier conditions across much of NPA. The observed climate changes have significant implications for regional hydrology and ecosystem dynamics. These findings underscore the importance of monitoring and understanding the intricate relationships between atmospheric circulation patterns and local climate dynamics in the face of ongoing climate change.
format conjunto de datos
other
acceptedVersion
author Martyniuk, Nicolás
author_facet Martyniuk, Nicolás
author_sort Martyniuk, Nicolás
title Climate change in North Patagonian Andes: temperature and precipitation patterns
title_short Climate change in North Patagonian Andes: temperature and precipitation patterns
title_full Climate change in North Patagonian Andes: temperature and precipitation patterns
title_fullStr Climate change in North Patagonian Andes: temperature and precipitation patterns
title_full_unstemmed Climate change in North Patagonian Andes: temperature and precipitation patterns
title_sort climate change in north patagonian andes: temperature and precipitation patterns
publisher Universidad Nacional del Comahue. Centro Regional Universitario Bariloche
publishDate 2024
url http://rdi.uncoma.edu.ar/handle/uncomaid/18107
work_keys_str_mv AT martyniuknicolas climatechangeinnorthpatagonianandestemperatureandprecipitationpatterns
_version_ 1823260150133161984

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