Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers
Aridity is an important component of climate change. Wildfires linked to dry conditions can drastically alter the biomass of a landscape. Diagnostic molecules created in these fires during the incomplete combustion of plants can be used to estimate past biomass burning events. Biomass burning marker...
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ftdatacite:10.7282/t3028thg 2023-05-15T13:33:32+02:00 Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers Weisel, Lauren Meredith 2015 https://dx.doi.org/10.7282/t3028thg https://rucore.libraries.rutgers.edu/rutgers-lib/48715/ unknown No Publisher Supplied Text article-journal ScholarlyArticle 2015 ftdatacite https://doi.org/10.7282/t3028thg 2021-11-05T12:55:41Z Aridity is an important component of climate change. Wildfires linked to dry conditions can drastically alter the biomass of a landscape. Diagnostic molecules created in these fires during the incomplete combustion of plants can be used to estimate past biomass burning events. Biomass burning markers (BBM) were isolated from three sites from the South Island of New Zealand, and quantified using GCMS analysis. A record of fire occurrence based on these BBM revealed a pattern of increased aridity in the past. The central South Island was characterized by persistent dryness in the glaciation, increased wetter periods marked the Younger Dryas and Antarctic Cold Reversal, followed by drier cycles with fewer periods of wetness into the early Holocene, and persistent wetting toward the late Holocene. The southern end of the South Island showed consistent wetness from the mid Holocene to the modern. Dryness changing in longer vs. shorter and wetter vs. drier is a pattern seen from the glaciation through the early Holocene. Pollen-based temperature reconstructions in the study sites do not agree with reconstructions from elsewhere in New Zealand. These new results documenting burning in the glaciation and through the early deglaciation are a plausible explanation for bias in these temperature reconstructions due to local aridity in the study areas of the South Island. Changes in this local aridity were likely due to the Southern Westerly Winds, which shifted north during the glaciation, then overall shifted southward toward the Holocene. Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic New Zealand |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Aridity is an important component of climate change. Wildfires linked to dry conditions can drastically alter the biomass of a landscape. Diagnostic molecules created in these fires during the incomplete combustion of plants can be used to estimate past biomass burning events. Biomass burning markers (BBM) were isolated from three sites from the South Island of New Zealand, and quantified using GCMS analysis. A record of fire occurrence based on these BBM revealed a pattern of increased aridity in the past. The central South Island was characterized by persistent dryness in the glaciation, increased wetter periods marked the Younger Dryas and Antarctic Cold Reversal, followed by drier cycles with fewer periods of wetness into the early Holocene, and persistent wetting toward the late Holocene. The southern end of the South Island showed consistent wetness from the mid Holocene to the modern. Dryness changing in longer vs. shorter and wetter vs. drier is a pattern seen from the glaciation through the early Holocene. Pollen-based temperature reconstructions in the study sites do not agree with reconstructions from elsewhere in New Zealand. These new results documenting burning in the glaciation and through the early deglaciation are a plausible explanation for bias in these temperature reconstructions due to local aridity in the study areas of the South Island. Changes in this local aridity were likely due to the Southern Westerly Winds, which shifted north during the glaciation, then overall shifted southward toward the Holocene. |
format |
Text |
author |
Weisel, Lauren Meredith |
spellingShingle |
Weisel, Lauren Meredith Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
author_facet |
Weisel, Lauren Meredith |
author_sort |
Weisel, Lauren Meredith |
title |
Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
title_short |
Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
title_full |
Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
title_fullStr |
Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
title_full_unstemmed |
Estimating New Zealand temperature and aridity since the last glacial maximum from biomass burning markers |
title_sort |
estimating new zealand temperature and aridity since the last glacial maximum from biomass burning markers |
publisher |
No Publisher Supplied |
publishDate |
2015 |
url |
https://dx.doi.org/10.7282/t3028thg https://rucore.libraries.rutgers.edu/rutgers-lib/48715/ |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_doi |
https://doi.org/10.7282/t3028thg |
_version_ |
1766043230182309888 |