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Persistent Identifier
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doi:10.23708/XFOV7D |
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Publication Date
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2026-03-24 |
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Title
| Coastal Marine Heatwaves (MHWs) in the South West Tropical Pacific (SWTP) - (1993-2023) |
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Author
| Lal, Shilpa (UMR LEGOS - CNES, CNRS, IRD, Univ.Toulouse III - Midi-Pyrénées Observatory - France) - ORCID: 0009-0004-1016-2051
Cravatte, Sophie (UMR LEGOS - CNES, CNRS, IRD, Univ.Toulouse III - Midi-Pyrénées Observatory - France) - ORCID: 0000-0002-2439-8952
Menkes, Christophe (UMR Entropie - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France) - ORCID: 0000-0002-1457-9696
Macdonald, Jed (Pacific Community) - ORCID: 0000-0002-5769-2912
Le Gendre, Romain (UMR Entropie - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France) - ORCID: 0000-0001-7015-8290
Mangolte, Inès (UMR Entropie - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France) - ORCID: 0000-0002-0358-844X
Dutheil, Cyril (UMR MARBEC - IRD, Ifremer, University of Montpellier, CNRS - France) - ORCID: 0000-0001-6891-2389
Holbrook, Neil (University of Tasmania - Australia) - ORCID: 0000-0002-3523-6254
Nicol, Simon (Pacific Community) - ORCID: 0000-0001-8193-8719 |
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Point of Contact
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Use email button above to contact.
LAL, Shilpa (UMR LEGOS - CNES, CNRS, IRD, Univ.Toulouse III - Midi-Pyrénées Observatory - France)
Cravatte, Sophie (UMR LEGOS - CNES, CNRS, IRD, Univ.Toulouse III - Midi-Pyrénées Observatory - France)
Menkes, Christophe (UMR Entropie - IRD, Université de La Réunion, CNRS, Ifremer, UNC - France) |
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Description
| This dataset contains information on all coastal MHWs for 12 Pacific Island Countries and Territories (PICTs) in the SWTP.
MHW detection was done to understand the nature of these extreme temperature events along the coastlines of these PICTs and characterise them in terms of their properties including duration, maximum and cumulative intensities and onset and decline rates. Means and trends of these properties were explored as well. (Visit https://github.com/shilpa-s-lal/mhws for MHW analysis scripts.)
MHWs were detected using the Hobday et al.(2016) method with a 90th percentile threshold and using OSTIA temperature product for the period 1993 to 2023 with the 1993 to 2019 period used as a baseline.
The 12 PICTs are as follows:
- New Caledonia labelled as "newcal" in the filenames.
- Solomon Islands labelled as "solo" in the filenames.
- Vanuatu
- Fiji
- Tonga
- Wallis and Futuna labelled as "wf" in the filenames.
- Samoa
- American Samoa labelled as "amsam" in the filenames.
- Niue
- Tokelau
- Tuvalu
- Cook Islands labelled as "cooks" in the filenames.
Files with filename "{country_name}_coastalpoints.csv"provides information on all points along the coastlines of the 12 PICTs where MHW detection was conducted.
Files with filename "combined_mhw_output_{country_name}.csv"contains information on the properties of each MHW at each coastal point. Refer to Marine heatwaves package documents developed by Eric Oliver to understand the calculation of each MHW property (https://github.com/ecjoliver/marineHeatWaves).
Files with filename "{country_name}.csv" contains trends, means and standard deviation of MHW properties at each coastal point.
In summary, the main output of the "combined_mhw_output_{country_name}.csv" files are:
- country - country of coastal MHW detection
- latitude,longitude - location of coastal point
- index_start,index_end,index_peak - timestep when MHW started, ended and peaked
- date_start,date_end,date_peak - date of MHW start, end and peak
- duration - duration of each MHW event (days)
- intensity_max,intensity_mean,intensity_cumulative - maximum intensity (deg. C), mean intensity (deg. C) and cummulative intensity (deg. C x days) of each MHW
- category - measure of severity of event
- rateonset,ratedecline - onset and decline rate of MHW event (deg. C / days)
- reaction_window_days,coping_window_days - days from start of event to peak of MHW event and days from peak of MHW event to end of the event.
In summary, the main output of the "{country_name}.csv" files are:
- country - country of coastal MHW detection
- latitude,longitude - location of coastal point
- mean_duration,std_duration - mean and standard deviation of MHW duration at that coastal point
- mean_intensity_mean,std_intensity_mean - mean and standard deviation of MHW intensity mean at that coastal point
- mean_intensity_var,std_intensity_var - mean and standard deviation of MHW intensity variability at that coastal point
- mean_intensity_max,std_intensity_max - mean and standard deviation of MHW intensity max at that coastal point
- mean_intensity_cumulative,std_intensity_cumulative - mean and standard deviation of MHW intensity cumulative at that coastal point
- mean_rate_onset,std_rate_onset - mean and standard deviation of MHW rate onset at that coastal point
- mean_rate_decline,std_rate_decline - mean and standard deviation of MHW rate decline at that coastal point
- mean_total_days,std_total_days - mean and standard deviation of MHW days each year.
- mean_total_icum,std_total_icum - mean and standard deviation of total cumulative intensity of all events each year.
- sig_trend_per_decade_count - significance and trend of number of events per year
- sig_trend_per_decade_duration - significance and trend of mHW duration per year
- sig_trend_per_decade_intensity_max - significance and trend of MHW intensity max per year
- sig_trend_per_decade_intensity_max_max - significance and trend of MHW max intensity max per year
- sig_trend_per_decade_intensity_mean - significnace and trend of MHW intensity mean per year
- sig_trend_per_decade_intensity_var - significance and trend of MHW intensity variability per year
- sig_trend_per_decade_intensity_cumulative - significance and trend of MHW intensity cumulative per year.
- sig_trend_per_decade_rate_onset - significance and trend of MHW onset rate per year
- sig_trend_per_decade_rate_decline - significance and trend of MHW decline rate per year
- sig_trend_per_decade_total_days - significance and trend of MHW days per year
- sig_trend_per_decade_total_icum - significance and trend of total cumulative intensity per year
- sum_total_days,sum_total_icum - sum no. of MHW days and sum cumulative intensity
- number_of_events - sum number of MHW events
- count_trend_per_decade - number of events per decade
- duration_trend_per_decade - MHW duration per decade
- intensity_max_trend_per_decade - MHW intensity max per decade
- intensity_max_max_trend_per_decade - max MHW intensity max per decade
- intensity_mean_trend_per_decade - MHW intensity mean per decade
- intensity_var_trend_per_decade - MHW intensity variability per decade
- intensity_cumulative_trend_per_decade - MHW intensity cumulative per decade
- rate_onset_trend_per_decade - MHW rate onset per decade
- rate_decline_trend_per_decade - MHW rate decline per decade
- total_days_trend_per_decade - MHW days per decade
- total_icum_trend_per_decade - MHW cumulative intensity per decade
- count_mean_per_year - mean number of MHW events per year
- duration_mean_per_year - mean MHW duration per year
- intensity_mean_mean_per_year - mean intensity mean per year
- intensity_max_max_mean_per_year - mean maximum intensity max per year
- intensity_var_mean_per_year - mean intensity variability per year
- intensity_cumulative_mean_per_year - mean intensity cumulative per year
- rate_onset_mean_per_year - mean rate onset per year
- rate_decline_mean_per_year - mean rate decline per year
- total_days_mean_per_year - mean sum MHW days per year
- total_icum_mean_per_year - mean sum intensity cumulative per year
(2026-03-18) |
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Subject
| Earth and Environmental Sciences |
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Keyword
| Marine heatwaves (Agrovoc) http://aims.fao.org/aos/agrovoc/c_70216ba5
Oceania (Loterre : Geographic Places (GP) Terminology Resource (Getty Research Institute)) http://data.loterre.fr/ark:/67375/45G-Q1BFP6L3-7
Coastal zone (Agrovoc) http://aims.fao.org/aos/agrovoc/c_fd44db40
Remote sensing (Agrovoc) http://aims.fao.org/aos/agrovoc/c_6498 |
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Scientific Theme
| Geography, environment and climatology (NumeriSud) https://uri.ird.fr/so/kos/tnu/021 |
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Related Publication
| Lal, S., Cravatte, S., Menkes, C., Macdonald, J., Legendre, R., Mangolte, I., Dutheil, C., Holbrook, N. and Nicol, S., 2025. Characterization of Past Marine Heatwaves around South Pacific Island Countries: What really matters?. EGUsphere [preprint]. doi: 10.5194/egusphere-2025-3281 https://doi.org/10.5194/egusphere-2025-3281 |
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Depositor
| LAL, Shilpa |
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Deposit Date
| 2026-03-17 |
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Time Period
| Start Date: 1993-01-01 ; End Date: 2023-10-30 |
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Related Material
| Alistair J. Hobday, Lisa V. Alexander, Sarah E. Perkins, Dan A. Smale, Sandra C. Straub, Eric C.J. Oliver, Jessica A. Benthuysen, Michael T. Burrows, Markus G. Donat, Ming Feng, Neil J. Holbrook, Pippa J. Moore, Hillary A. Scannell, Alex Sen Gupta, Thomas Wernberg,A hierarchical approach to defining marine heatwaves,Progress in Oceanography,Volume 141,2016,Pages 227-238,ISSN 0079-6611,https://doi.org/10.1016/j.pocean.2015.12.014. |
