Tropical Western Pacific hydrology during the last 6,000 years based on wildfire charcoal records from Borneo

DOI

The forcing of multi-centennial climate variability in the Western Pacific Warm Pool (WPWP) region is not fully understood. Here we generated 6-ky long continuous charcoal records from five peatlands in Borneo. Every several hundred years, peaks of charcoal influx were identified in the composite record, indicating that the peatlands repeatedly experienced dry conditions and wildfires. Major fire events were identified at ~5.4, 4.7, 4.4, 3.7, 3.2, 2.7, 2.4, 2.2, 1.7, 1.1, 0.6 and 0.3 ka. Most of these coincided with the maxima of Borneo speleothem δ18O, and occurred in the high solar activity periods following the solar minima. This suggests that the higher solar activity decreased rainfall, increasing dryness and wildfire frequency. This result challenges the hypothesis that high solar activity intensifies atmospheric convection in the WPWP area.

Identifier
DOI https://doi.org/10.1594/PANGAEA.934142
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.934142
Provenance
Creator Yamamoto, Masanobu (ORCID: 0000-0003-1312-825X)
Publisher PANGAEA
Publication Year 2021
Funding Reference Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID 15H05210 https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H05210/ JSPS KAKENHI; Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID 19H05595 https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H05595 JSPS KAKENHI; Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID JPMXS05R2900001
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 5 data points
Discipline Earth System Research
Spatial Coverage (111.174W, 1.482S, 114.261E, 4.212N); Borneo, Malaysia