Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania)
International audience Tropical rainfall isotopic composition results from complex processes. The climatological and environmental variability in East Africa increases this complexity. Long rainfall isotope datasets are needed to fill the lack of observations in this region. At Kisiba Masoko, Tanzan...
Published in: | Isotopes in Environmental and Health Studies |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
|
Subjects: | |
Online Access: | https://hal.science/hal-01791167 https://doi.org/10.1080/10256016.2018.1443923 |
id |
ftceafr:oai:HAL:hal-01791167v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
isotope hydrology seasonal variations East African Rift oxygen-18 precipitation Back-tracking climatology deuterium excess hydrogen-2 intertropical front [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
isotope hydrology seasonal variations East African Rift oxygen-18 precipitation Back-tracking climatology deuterium excess hydrogen-2 intertropical front [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Nivet, Fantine Bergonzini, Laurent Mathé, Pierre-Étienne Noret, Aurélie Monvoisin, Gaël Majule, Amos Williamson, David Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
topic_facet |
isotope hydrology seasonal variations East African Rift oxygen-18 precipitation Back-tracking climatology deuterium excess hydrogen-2 intertropical front [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Tropical rainfall isotopic composition results from complex processes. The climatological and environmental variability in East Africa increases this complexity. Long rainfall isotope datasets are needed to fill the lack of observations in this region. At Kisiba Masoko, Tanzania, rainfall and rain isotopic composition have been monitored during 6 years. Mean year profiles allow to analyse the seasonal variations. The mean annual rainfall is 2099mm with a rain-weighted mean composition of -3.2 parts per thousand for delta O-18 and -11.7 parts per thousand for delta H-2. The results are consistent with available data although they present their own specificity. Thus, if the local meteoric water line is delta H-2=8.6 delta O-18+14.8, two seasonal lines are observed. The seasonality of the isotopic composition in rain and deuterium excess has been compared with precipitating air masses backtracking trajectories to characterize a simple scheme of vapour histories. The three major oceanic sources have two moisture signatures with their own trajectory histories: one originated from the tropical Indian Ocean at the beginning of the rainy season and one from the Austral Ocean at its end. The presented isotopic seasonality depends on the balance of the intertropical front and provides a useful dataset to improve the knowledge about local processes. |
author2 |
Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Resource Assessment Université de Dar es Salaam (UDSM) Institut de Recherche pour le Développement (IRD) Biogéochimie-Traceurs-Paléoclimat (BTP) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) |
format |
Article in Journal/Newspaper |
author |
Nivet, Fantine Bergonzini, Laurent Mathé, Pierre-Étienne Noret, Aurélie Monvoisin, Gaël Majule, Amos Williamson, David |
author_facet |
Nivet, Fantine Bergonzini, Laurent Mathé, Pierre-Étienne Noret, Aurélie Monvoisin, Gaël Majule, Amos Williamson, David |
author_sort |
Nivet, Fantine |
title |
Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
title_short |
Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
title_full |
Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
title_fullStr |
Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
title_full_unstemmed |
Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) |
title_sort |
influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at kisiba masoko (rungwe volcanic province, sw, tanzania) |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01791167 https://doi.org/10.1080/10256016.2018.1443923 |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) |
geographic |
Austral Austral Ocean Indian |
geographic_facet |
Austral Austral Ocean Indian |
genre |
Austral Ocean |
genre_facet |
Austral Ocean |
op_source |
ISSN: 1025-6016 Isotopes in Environmental and Health Studies https://hal.science/hal-01791167 Isotopes in Environmental and Health Studies, 2018, 54 (4), pp.352-369. ⟨10.1080/10256016.2018.1443923⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1080/10256016.2018.1443923 info:eu-repo/semantics/altIdentifier/pmid/29499620 hal-01791167 https://hal.science/hal-01791167 doi:10.1080/10256016.2018.1443923 IRD: fdi:010072880 PRODINRA: 453099 PUBMED: 29499620 WOS: 000435686200002 |
op_doi |
https://doi.org/10.1080/10256016.2018.1443923 |
container_title |
Isotopes in Environmental and Health Studies |
container_volume |
54 |
container_issue |
4 |
container_start_page |
352 |
op_container_end_page |
369 |
_version_ |
1802642558170431488 |
spelling |
ftceafr:oai:HAL:hal-01791167v1 2024-06-23T07:51:27+00:00 Influence of the balance of the intertropical front on seasonal variations of the isotopic composition in rainfall at Kisiba Masoko (Rungwe Volcanic Province, SW, Tanzania) Nivet, Fantine Bergonzini, Laurent Mathé, Pierre-Étienne Noret, Aurélie Monvoisin, Gaël Majule, Amos Williamson, David Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Resource Assessment Université de Dar es Salaam (UDSM) Institut de Recherche pour le Développement (IRD) Biogéochimie-Traceurs-Paléoclimat (BTP) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 2018-03-02 https://hal.science/hal-01791167 https://doi.org/10.1080/10256016.2018.1443923 en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1080/10256016.2018.1443923 info:eu-repo/semantics/altIdentifier/pmid/29499620 hal-01791167 https://hal.science/hal-01791167 doi:10.1080/10256016.2018.1443923 IRD: fdi:010072880 PRODINRA: 453099 PUBMED: 29499620 WOS: 000435686200002 ISSN: 1025-6016 Isotopes in Environmental and Health Studies https://hal.science/hal-01791167 Isotopes in Environmental and Health Studies, 2018, 54 (4), pp.352-369. ⟨10.1080/10256016.2018.1443923⟩ isotope hydrology seasonal variations East African Rift oxygen-18 precipitation Back-tracking climatology deuterium excess hydrogen-2 intertropical front [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2018 ftceafr https://doi.org/10.1080/10256016.2018.1443923 2024-06-10T23:49:16Z International audience Tropical rainfall isotopic composition results from complex processes. The climatological and environmental variability in East Africa increases this complexity. Long rainfall isotope datasets are needed to fill the lack of observations in this region. At Kisiba Masoko, Tanzania, rainfall and rain isotopic composition have been monitored during 6 years. Mean year profiles allow to analyse the seasonal variations. The mean annual rainfall is 2099mm with a rain-weighted mean composition of -3.2 parts per thousand for delta O-18 and -11.7 parts per thousand for delta H-2. The results are consistent with available data although they present their own specificity. Thus, if the local meteoric water line is delta H-2=8.6 delta O-18+14.8, two seasonal lines are observed. The seasonality of the isotopic composition in rain and deuterium excess has been compared with precipitating air masses backtracking trajectories to characterize a simple scheme of vapour histories. The three major oceanic sources have two moisture signatures with their own trajectory histories: one originated from the tropical Indian Ocean at the beginning of the rainy season and one from the Austral Ocean at its end. The presented isotopic seasonality depends on the balance of the intertropical front and provides a useful dataset to improve the knowledge about local processes. Article in Journal/Newspaper Austral Ocean HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Indian Isotopes in Environmental and Health Studies 54 4 352 369 |