{"id":{"repo_id":"wvu","oai_identifier":"oai:researchrepository.wvu.edu:etd-1539"},"canonical_url":"https://search.dev.ndltd.org/etd/wvu/oai:researchrepository.wvu.edu:etd-1539","repository":{"repo_id":"wvu","name":"West Virginia University","base_url":"https://researchrepository.wvu.edu/do/oai/"},"display":{"title":"Hydroclimatic Variability in North-central Mongolia as Inferred from Tree Rings","abstract":"The influence of increasing temperatures on hydrologic regimes across Mongolia is difficult to evaluate from a spatial perspective, particularly at fine resolutions. Therefore, networks of tree-ring chronologies are a valuable means of assessing regional and local variability in hydroclimate while placing recent moisture trends in a historical context. Tree-ring data are particularly useful in Mongolia, where instrumental records are spatially and temporally limited. Here, I present two chapters that are essentially related and complement one another. The first chapter seeks to identify tree-growth anomaly regions (i.e. inferred hydroclimatic regions) across north-central Mongolia based on a network of 21 tree-ring chronologies. I applied a rotated principal component analysis (RPCA) to the tree-ring network and identified four tree-growth anomaly regions, which display unique hydroclimatic variability through time. Chapter Two evaluates the tree-growth anomaly regions in terms of ranked drought and pluvial events. From a spatial perspective, these analyses demonstrate the extent of interregional and intraregional hydroclimatic variability across the network; in particular, the results highlight that the Eastern and Western regions of the network are especially unique from one another. Each chapter is presented in a journal article format and consists of its own abstract.","abstract_html":"The influence of increasing temperatures on hydrologic regimes across Mongolia is difficult to evaluate from a spatial perspective, particularly at fine resolutions. Therefore, networks of tree-ring chronologies are a valuable means of assessing regional and local variability in hydroclimate while placing recent moisture trends in a historical context. Tree-ring data are particularly useful in Mongolia, where instrumental records are spatially and temporally limited. Here, I present two chapters that are essentially related and complement one another. The first chapter seeks to identify tree-growth anomaly regions (i.e. inferred hydroclimatic regions) across north-central Mongolia based on a network of 21 tree-ring chronologies. I applied a rotated principal component analysis (RPCA) to the tree-ring network and identified four tree-growth anomaly regions, which display unique hydroclimatic variability through time. Chapter Two evaluates the tree-growth anomaly regions in terms of ranked drought and pluvial events. From a spatial perspective, these analyses demonstrate the extent of interregional and intraregional hydroclimatic variability across the network; in particular, the results highlight that the Eastern and Western regions of the network are especially unique from one another. Each chapter is presented in a journal article format and consists of its own abstract.","abstract_has_math":false,"creators":["Leland, Caroline"],"institution":null,"degree_name":"MA","degree_level":"Thesis","degree_discipline":"Geology and Geography","degree_department":null,"school":null,"contributors":["Amy Hessl","Branden McNeil","Neil Pederson"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-12-01T08:00:00Z","date_published":"2011-12-01T08:00:00Z","updated_at":"2026-07-24T06:14:38Z","subjects":["Physical geography","Paleoclimate science"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://researchrepository.wvu.edu/etd/536"],"render_values":[{"text":"https://researchrepository.wvu.edu/etd/536","href":"https://researchrepository.wvu.edu/etd/536","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.33915/etd.536","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Amy Hessl","Branden McNeil","Neil Pederson"]},{"key":"dc:creator","label":"Author","values":["Leland, Caroline"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2019-01-17T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geology and Geography"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["MA"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physical geography","Paleoclimate science"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://doi.org/10.33915/etd.536","https://researchrepository.wvu.edu/etd/536"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The influence of increasing temperatures on hydrologic regimes across Mongolia is difficult to evaluate from a spatial perspective, particularly at fine resolutions. Therefore, networks of tree-ring chronologies are a valuable means of assessing regional and local variability in hydroclimate while placing recent moisture trends in a historical context. Tree-ring data are particularly useful in Mongolia, where instrumental records are spatially and temporally limited. Here, I present two chapters that are essentially related and complement one another. The first chapter seeks to identify tree-growth anomaly regions (i.e. inferred hydroclimatic regions) across north-central Mongolia based on a network of 21 tree-ring chronologies. I applied a rotated principal component analysis (RPCA) to the tree-ring network and identified four tree-growth anomaly regions, which display unique hydroclimatic variability through time. Chapter Two evaluates the tree-growth anomaly regions in terms of ranked drought and pluvial events. From a spatial perspective, these analyses demonstrate the extent of interregional and intraregional hydroclimatic variability across the network; in particular, the results highlight that the Eastern and Western regions of the network are especially unique from one another. Each chapter is presented in a journal article format and consists of its own abstract."]},{"key":"dc:title","label":"Title","values":["Hydroclimatic Variability in North-central Mongolia as Inferred from Tree Rings"]}]}],"canonical_facts":{"dc:contributor":["Amy Hessl","Branden McNeil","Neil Pederson"],"dc:creator":["Leland, Caroline"],"dc:date.available":["2019-01-17T08:00:00Z"],"dc:description.abstract":["The influence of increasing temperatures on hydrologic regimes across Mongolia is difficult to evaluate from a spatial perspective, particularly at fine resolutions. Therefore, networks of tree-ring chronologies are a valuable means of assessing regional and local variability in hydroclimate while placing recent moisture trends in a historical context. Tree-ring data are particularly useful in Mongolia, where instrumental records are spatially and temporally limited. Here, I present two chapters that are essentially related and complement one another. The first chapter seeks to identify tree-growth anomaly regions (i.e. inferred hydroclimatic regions) across north-central Mongolia based on a network of 21 tree-ring chronologies. I applied a rotated principal component analysis (RPCA) to the tree-ring network and identified four tree-growth anomaly regions, which display unique hydroclimatic variability through time. Chapter Two evaluates the tree-growth anomaly regions in terms of ranked drought and pluvial events. From a spatial perspective, these analyses demonstrate the extent of interregional and intraregional hydroclimatic variability across the network; in particular, the results highlight that the Eastern and Western regions of the network are especially unique from one another. Each chapter is presented in a journal article format and consists of its own abstract."],"dc:identifier":["https://doi.org/10.33915/etd.536","https://researchrepository.wvu.edu/etd/536"],"dc:subject":["Physical geography","Paleoclimate science"],"dc:title":["Hydroclimatic Variability in North-central Mongolia as Inferred from Tree Rings"],"thesis:degree_discipline":["Geology and Geography"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["MA"]},"updated_at":"2026-07-24T06:14:38Z"}