Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada
Ponds form the dominant feature of Polar Bear Pass (PBP), one of the largest wetlands in the Canadian High Arctic, and in order to understand the ramifications of climatic changes on PBP we must first understand the ponds' responses to seasonal changes in climatic, physical, chemical, and carbo...
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ftyorkuniv:oai:yorkspace.library.yorku.ca:10315/31424 2023-05-15T14:58:09+02:00 Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada Abnizova, Anna Young, Kathy L. 2016-06-23 application/pdf http://hdl.handle.net/10315/31424 unknown http://hdl.handle.net/10315/31424 Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests. Polar Bear Pass Wetlands Canadian High Arctic Hydrology Pond systems Electronic Thesis or Dissertation 2016 ftyorkuniv 2022-08-22T13:05:27Z Ponds form the dominant feature of Polar Bear Pass (PBP), one of the largest wetlands in the Canadian High Arctic, and in order to understand the ramifications of climatic changes on PBP we must first understand the ponds' responses to seasonal changes in climatic, physical, chemical, and carbon components. Fieldwork (2007-2010) at PBP aimed (i) to determine water budgets of ponds with various hydrologic settings, (ii) to identify the processes controlling the changes in pond carbon and geochemistry on seasonal and inter-annual bases with a special focus on the snowmelt period, and (iii) to establish the baseline hydrochemistry and hydrology of ponds within the PBP wetland complex. Pond systems at PBP have two hydrologic settings: (i) ones which are hydrologically connected to additional sources of water from their catchments beyond seasonal inputs of snowmelt and rainfall, or (ii) ponds which fail to form a link or only have a limited connection with their surrounding catchments. Intensive seasonal monitoring of water and carbon mass balance showed that elevated loads of dissolved organic carbon (DOC) in ponds were mostly of terrestrial origin and occurred in ponds receiving meltwater from snowbeds and/or discharge from hillslope creeks. The seasonal strength in the connectivity of a pond to its catchment from snowmelt to the postsnowmelt period was critical in controlling DOC loads and concentrations. This study provided the first estimates of DOC yields at Polar Bear Pass, and reported elevated DOC loadings from wet meadow catchments into ponds. This highlights their importance as a source of carbon to pond ecosystems during snowmelt and heavy rainfall events. The water chemistry and environmental data showed that waters at PBP were dominated by calcium and bicarbonate ions that fell on a common dilution line, however, they had distinct proportional major ionic variability due to the location, lithology, and level of water-bedrock interaction, and these dynamics were controlled by differences in climatic ... Thesis Arctic Bathurst Island Nunavut York University, Toronto: YorkSpace Arctic Bathurst Island ENVELOPE(-100.002,-100.002,75.752,75.752) Bear Pass ENVELOPE(-127.770,-127.770,61.600,61.600) Canada Nunavut Polar Bear Pass ENVELOPE(-98.385,-98.385,75.718,75.718) |
institution |
Open Polar |
collection |
York University, Toronto: YorkSpace |
op_collection_id |
ftyorkuniv |
language |
unknown |
topic |
Polar Bear Pass Wetlands Canadian High Arctic Hydrology Pond systems |
spellingShingle |
Polar Bear Pass Wetlands Canadian High Arctic Hydrology Pond systems Abnizova, Anna Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
topic_facet |
Polar Bear Pass Wetlands Canadian High Arctic Hydrology Pond systems |
description |
Ponds form the dominant feature of Polar Bear Pass (PBP), one of the largest wetlands in the Canadian High Arctic, and in order to understand the ramifications of climatic changes on PBP we must first understand the ponds' responses to seasonal changes in climatic, physical, chemical, and carbon components. Fieldwork (2007-2010) at PBP aimed (i) to determine water budgets of ponds with various hydrologic settings, (ii) to identify the processes controlling the changes in pond carbon and geochemistry on seasonal and inter-annual bases with a special focus on the snowmelt period, and (iii) to establish the baseline hydrochemistry and hydrology of ponds within the PBP wetland complex. Pond systems at PBP have two hydrologic settings: (i) ones which are hydrologically connected to additional sources of water from their catchments beyond seasonal inputs of snowmelt and rainfall, or (ii) ponds which fail to form a link or only have a limited connection with their surrounding catchments. Intensive seasonal monitoring of water and carbon mass balance showed that elevated loads of dissolved organic carbon (DOC) in ponds were mostly of terrestrial origin and occurred in ponds receiving meltwater from snowbeds and/or discharge from hillslope creeks. The seasonal strength in the connectivity of a pond to its catchment from snowmelt to the postsnowmelt period was critical in controlling DOC loads and concentrations. This study provided the first estimates of DOC yields at Polar Bear Pass, and reported elevated DOC loadings from wet meadow catchments into ponds. This highlights their importance as a source of carbon to pond ecosystems during snowmelt and heavy rainfall events. The water chemistry and environmental data showed that waters at PBP were dominated by calcium and bicarbonate ions that fell on a common dilution line, however, they had distinct proportional major ionic variability due to the location, lithology, and level of water-bedrock interaction, and these dynamics were controlled by differences in climatic ... |
author2 |
Young, Kathy L. |
format |
Thesis |
author |
Abnizova, Anna |
author_facet |
Abnizova, Anna |
author_sort |
Abnizova, Anna |
title |
Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
title_short |
Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
title_full |
Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
title_fullStr |
Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
title_full_unstemmed |
Hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient High Arctic wetland, Polar Bear Pass, Bathurst Island, Nunavut, Canada |
title_sort |
hydrology, carbon dynamics and hydrochemical properties of ponds in an extensive low gradient high arctic wetland, polar bear pass, bathurst island, nunavut, canada |
publishDate |
2016 |
url |
http://hdl.handle.net/10315/31424 |
long_lat |
ENVELOPE(-100.002,-100.002,75.752,75.752) ENVELOPE(-127.770,-127.770,61.600,61.600) ENVELOPE(-98.385,-98.385,75.718,75.718) |
geographic |
Arctic Bathurst Island Bear Pass Canada Nunavut Polar Bear Pass |
geographic_facet |
Arctic Bathurst Island Bear Pass Canada Nunavut Polar Bear Pass |
genre |
Arctic Bathurst Island Nunavut |
genre_facet |
Arctic Bathurst Island Nunavut |
op_relation |
http://hdl.handle.net/10315/31424 |
op_rights |
Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests. |
_version_ |
1766330247415857152 |