Details
| Original language | English |
|---|---|
| Article number | 5427 |
| Journal | Remote sensing |
| Volume | 14 |
| Issue number | 21 |
| Early online date | 28 Oct 2022 |
| Publication status | Published - 1 Nov 2022 |
| Externally published | Yes |
Abstract
The Central Andes in northwestern Argentina are characterized by steep topographic and climatic gradients. The humid foreland areas at 1 km asl elevation rapidly rise to over 5 km in the eastern Cordillera, and they form an orographic rainfall barrier on the eastern windward side. This topographic setting combined with seasonal moisture transport through the South American monsoon system leads to intense rainstorms with cascading effects such as landsliding and flooding. In order to better quantify the dynamics of water vapour transport, we use high-temporal-resolution global navigation satellite system (GNSS) remote sensing techniques. We are particularly interested in better understanding the dynamics of high-magnitude storms with high water vapour amounts that have destructive effects on human infrastructure. We used an existing GNSS station network with 12 years of time series data, and we installed two new ground stations along the climatic gradient and collected GNSS time series data for three years. For several stations we calculated the GNSS signal delay gradient to determine water vapour transport direction. Our statistical analysis combines in situ rainfall measurements and ERA5 reanalysis data to reveal the water vapour transport mechanism for the study area. The results show a strong relationship between altitude and the water vapour content, as well as between the transportation pathways and the topography.
Keywords
- Central Andes, GNSS meteorology, GNSS remote sensing, intense rain events, orographic barrier, South American monsoon system, water vapour
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Remote sensing, Vol. 14, No. 21, 5427, 01.11.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Water-Vapour Monitoring from Ground-Based GNSS Observations in Northwestern Argentina
AU - Antonoglou, Nikolaos
AU - Balidakis, Kyriakos
AU - Wickert, Jens
AU - Dick, Galina
AU - de la Torre, Alejandro
AU - Bookhagen, Bodo
N1 - Publisher Copyright: © 2022 by the authors.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - The Central Andes in northwestern Argentina are characterized by steep topographic and climatic gradients. The humid foreland areas at 1 km asl elevation rapidly rise to over 5 km in the eastern Cordillera, and they form an orographic rainfall barrier on the eastern windward side. This topographic setting combined with seasonal moisture transport through the South American monsoon system leads to intense rainstorms with cascading effects such as landsliding and flooding. In order to better quantify the dynamics of water vapour transport, we use high-temporal-resolution global navigation satellite system (GNSS) remote sensing techniques. We are particularly interested in better understanding the dynamics of high-magnitude storms with high water vapour amounts that have destructive effects on human infrastructure. We used an existing GNSS station network with 12 years of time series data, and we installed two new ground stations along the climatic gradient and collected GNSS time series data for three years. For several stations we calculated the GNSS signal delay gradient to determine water vapour transport direction. Our statistical analysis combines in situ rainfall measurements and ERA5 reanalysis data to reveal the water vapour transport mechanism for the study area. The results show a strong relationship between altitude and the water vapour content, as well as between the transportation pathways and the topography.
AB - The Central Andes in northwestern Argentina are characterized by steep topographic and climatic gradients. The humid foreland areas at 1 km asl elevation rapidly rise to over 5 km in the eastern Cordillera, and they form an orographic rainfall barrier on the eastern windward side. This topographic setting combined with seasonal moisture transport through the South American monsoon system leads to intense rainstorms with cascading effects such as landsliding and flooding. In order to better quantify the dynamics of water vapour transport, we use high-temporal-resolution global navigation satellite system (GNSS) remote sensing techniques. We are particularly interested in better understanding the dynamics of high-magnitude storms with high water vapour amounts that have destructive effects on human infrastructure. We used an existing GNSS station network with 12 years of time series data, and we installed two new ground stations along the climatic gradient and collected GNSS time series data for three years. For several stations we calculated the GNSS signal delay gradient to determine water vapour transport direction. Our statistical analysis combines in situ rainfall measurements and ERA5 reanalysis data to reveal the water vapour transport mechanism for the study area. The results show a strong relationship between altitude and the water vapour content, as well as between the transportation pathways and the topography.
KW - Central Andes
KW - GNSS meteorology
KW - GNSS remote sensing
KW - intense rain events
KW - orographic barrier
KW - South American monsoon system
KW - water vapour
UR - http://www.scopus.com/inward/record.url?scp=85141881497&partnerID=8YFLogxK
U2 - 10.3390/rs14215427
DO - 10.3390/rs14215427
M3 - Article
AN - SCOPUS:85141881497
VL - 14
JO - Remote sensing
JF - Remote sensing
SN - 2072-4292
IS - 21
M1 - 5427
ER -