Bryan G Mark
Biographic Data
| ID | 3635682 |
|---|---|
| NAME | Bryan G Mark |
| GIVEN NAMES | Bryan G |
| FAMILY NAME | Mark |
| SIGNATURE | MARK B G |
| VERIFIED | No |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 40 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 3 |
Effectiveness of Billion Trees Tsunami Afforestation Projects in restoration of forests in Pakistan
The history of forest cover dynamics in Pakistan reveals an unsatisfactory environmental situation. In the past 5 decades, particularly during the period between 1990 and 2010, the country lost an average of 41,100 hectares of green cover with a deforestation rate of 1.6% per year. The factors behind that this high deforestation rate is numerous including socio-economic transformation after the major political change during the 1970s in the mount…
A lake sediment–based paleoecological reconstruction of late Holocene fire history and vegetation change in Great Basin National Park, Nevada, USA
Analyses of macroscopic charcoal, sediment geochemistry (%C, %N, C/N, δ 13 C, δ 15 N), and fossil pollen were conducted on a sediment core recovered from Stella Lake, Nevada, establishing a 2000 year record of fire history and vegetation change for the Great Basin. Charcoal accumulation rates (CHAR) indicate that fire activity, which was minimal from the beginning of the first millennium to AD 750, increased slightly at the onset of the Medieval …
Mountain Climatology
Mountain climatology is the study of processes and atmospheric phenomena caused by protrusions of the lithosphere into the atmosphere. The nature and scale of these processes varies, as do the effects, depending on the type of mountains involved and location relative to prevailing winds. Fundamentally, mountains have vertically heterogeneous climatic zones, often capped by snow and ice. The diversity of mountain climates preside over Earth's most…
The significance of mountain glaciers as sentinels of climate and environmental change
Mountain glaciers are transient hydrologic reservoirs persisting at the habitable extremes of Earth that both document and respond to climate change. They withhold water in solid phase from other reservoirs and ultimately impact sea levels. Moreover, they are valued resources with economic and cultural significance for human societies living below them. They also preserve histories of past climates. Yet, when climate change forces glaciers to los…
Impacts of Glacier Recession and Declining Meltwater on Mountain Societies
Glacierized mountains are often referred to as our world's water towers because glaciers both store water over time and regulate seasonal stream flow, releasing runoff during dry seasons when societies most need water. Ice loss thus has the potential to affect human societies in diverse ways, including irrigation, agriculture, hydropower, potable water, livelihoods, recreation, spirituality, and demography. Unfortunately, research focusing on the…
A multi-proxy paleolimnology study of the impact of climate change and atmospheric pollutant loadings on aquatic ecosystems in the Great Basin, United States
A 2000-yr reconstruction of air temperature in the Great Basin of the United States with specific reference to the Medieval Climatic Anomaly
A sediment core representing the past two millennia was recovered from Stella Lake in the Snake Range of the central Great Basin in Nevada. The core was analyzed for sub-fossil chironomids and sediment organic content. A quantitative reconstruction of mean July air temperature (MJAT) was developed using a regional training set and a chironomid-based WA-PLS inference model (r 2 jack = 0.55, RMSEP = 0.9°C). The chironomid-based MJAT reconstruction …
New Geographies of Water and Climate Change in Peru: Coupled Natural and Social Transformations in the Santa River Watershed
Projections of future water shortages in the world's glaciated mountain ranges have grown increasingly dire. Although water modeling research has begun to examine changing environmental parameters, the inclusion of social scenarios has been very limited. Yet human water use and demand are vital for long-term adaptation, risk reduction, and resource allocation. Concerns about future water supplies are particularly pronounced on Peru's arid Pacific…
Application of a midge-based inference model for air temperature reveals evidence of late-20th century warming in sub-alpine lakes in the central Great Basin, United States
Climate Change and Tropical Andean Glacier Recession: Evaluating Hydrologic Changes and Livelihood Vulnerability in the Cordillera Blanca, Peru
Climate change is forcing dramatic glacier mass loss in the Cordillera Blanca, Peru, resulting in hydrologic transformations across the Rio Santa watershed and increasing human vulnerability. This article presents results from two years of transdisciplinary collaborative research evaluating the complex relationships between coupled environmental and social change in the region. First, hydrologic results suggest there has been an average increase …
A multi-proxy paleolimnological reconstruction of Holocene climate conditions in the Great Basin, United States
A sediment core spanning ∼ 7000 cal yr BP recovered from Stella Lake, a small sub-alpine lake located in Great Basin National Park, Nevada, was analyzed for subfossil chironomids (non-biting midges), diatoms, and organic content (estimated by loss-on-ignition (LOI)). Subfossil chironomid analysis indicates that Stella Lake was characterized by a warm, middle Holocene, followed by a cool “Neoglacial” period, with the last two millennia characteriz…
Climate change and tropical Andean glaciers: Past, present and future
Adapting to Uncertain Futures: A Report on New Glacier Recession and Livelihood Vulnerability Research in the Peruvian Andes
Dr. Geoffrey Owen Seltzer
Rates of Deglaciation during the Last Glaciation and Holocene in the Cordillera Vilcanota-Quelccaya Ice Cap Region, Southeastern Perú
Moraine chronology is combined with digital topography to model deglacial rates of paleoglacier volumes in both the Huancané Valley on the west side of the Quelccaya Ice Cap and the Upismayo Valley on the northwest side of the Cordillera Vilcanota. The fastest rates of deglaciation (39×10 −5 to 114×10 −5 km 3 yr −1 and 112×10 −5 to 247×10 −5 km 3 yr −1 for each valley, respectively) were calculated for the most recent paleoglaciers, corresponding…
Subdivision of Glacial Deposits in Southeastern Peru Based on Pedogenic Development and Radiometric Ages
The Cordillera Vilcanota and Quelccaya Ice Cap region of southern Peru (13°30′–14°00′S; 70°40′–71°25′W) contains a detailed record of late Quaternary glaciation in the tropical Andes. Quantification of soil development on 19 moraine crests and radiocarbon ages are used to reconstruct the glacial history. Secondary iron and clay increase linearly in Quelccaya soils and clay accumulates at a linear rate in Vilcanota soils, which may reflect the sem…
New Geographies of Water and Climate Change in Peru: Coupled Natural and Social Transformations in the Santa River Watershed
Projections of future water shortages in the world's glaciated mountain ranges have grown increasingly dire. Although water modeling research has begun to examine changing environmental parameters, the inclusion of social scenarios has been very limited. Yet human water use and demand are vital for long-term adaptation, risk reduction, and resource allocation. Concerns about future water supplies are particularly pronounced on Peru's arid Pacific…
Impacts of Glacier Recession and Declining Meltwater on Mountain Societies
Glacierized mountains are often referred to as our world's water towers because glaciers both store water over time and regulate seasonal stream flow, releasing runoff during dry seasons when societies most need water. Ice loss thus has the potential to affect human societies in diverse ways, including irrigation, agriculture, hydropower, potable water, livelihoods, recreation, spirituality, and demography. Unfortunately, research focusing on the…
Climate Change and Tropical Andean Glacier Recession: Evaluating Hydrologic Changes and Livelihood Vulnerability in the Cordillera Blanca, Peru
Climate change is forcing dramatic glacier mass loss in the Cordillera Blanca, Peru, resulting in hydrologic transformations across the Rio Santa watershed and increasing human vulnerability. This article presents results from two years of transdisciplinary collaborative research evaluating the complex relationships between coupled environmental and social change in the region. First, hydrologic results suggest there has been an average increase …
Subdivision of Glacial Deposits in Southeastern Peru Based on Pedogenic Development and Radiometric Ages
The Cordillera Vilcanota and Quelccaya Ice Cap region of southern Peru (13°30′–14°00′S; 70°40′–71°25′W) contains a detailed record of late Quaternary glaciation in the tropical Andes. Quantification of soil development on 19 moraine crests and radiocarbon ages are used to reconstruct the glacial history. Secondary iron and clay increase linearly in Quelccaya soils and clay accumulates at a linear rate in Vilcanota soils, which may reflect the sem…
Rates of Deglaciation during the Last Glaciation and Holocene in the Cordillera Vilcanota-Quelccaya Ice Cap Region, Southeastern Perú
Moraine chronology is combined with digital topography to model deglacial rates of paleoglacier volumes in both the Huancané Valley on the west side of the Quelccaya Ice Cap and the Upismayo Valley on the northwest side of the Cordillera Vilcanota. The fastest rates of deglaciation (39×10 −5 to 114×10 −5 km 3 yr −1 and 112×10 −5 to 247×10 −5 km 3 yr −1 for each valley, respectively) were calculated for the most recent paleoglaciers, corresponding…
Dr. Geoffrey Owen Seltzer
Climate change and tropical Andean glaciers: Past, present and future
Adapting to Uncertain Futures: A Report on New Glacier Recession and Livelihood Vulnerability Research in the Peruvian Andes
A multi-proxy paleolimnological reconstruction of Holocene climate conditions in the Great Basin, United States
A sediment core spanning ∼ 7000 cal yr BP recovered from Stella Lake, a small sub-alpine lake located in Great Basin National Park, Nevada, was analyzed for subfossil chironomids (non-biting midges), diatoms, and organic content (estimated by loss-on-ignition (LOI)). Subfossil chironomid analysis indicates that Stella Lake was characterized by a warm, middle Holocene, followed by a cool “Neoglacial” period, with the last two millennia characteriz…
Application of a midge-based inference model for air temperature reveals evidence of late-20th century warming in sub-alpine lakes in the central Great Basin, United States
Climate Change and Tropical Andean Glacier Recession: Evaluating Hydrologic Changes and Livelihood Vulnerability in the Cordillera Blanca, Peru
Climate change is forcing dramatic glacier mass loss in the Cordillera Blanca, Peru, resulting in hydrologic transformations across the Rio Santa watershed and increasing human vulnerability. This article presents results from two years of transdisciplinary collaborative research evaluating the complex relationships between coupled environmental and social change in the region. First, hydrologic results suggest there has been an average increase …
New Geographies of Water and Climate Change in Peru: Coupled Natural and Social Transformations in the Santa River Watershed
Projections of future water shortages in the world's glaciated mountain ranges have grown increasingly dire. Although water modeling research has begun to examine changing environmental parameters, the inclusion of social scenarios has been very limited. Yet human water use and demand are vital for long-term adaptation, risk reduction, and resource allocation. Concerns about future water supplies are particularly pronounced on Peru's arid Pacific…
A 2000-yr reconstruction of air temperature in the Great Basin of the United States with specific reference to the Medieval Climatic Anomaly
A sediment core representing the past two millennia was recovered from Stella Lake in the Snake Range of the central Great Basin in Nevada. The core was analyzed for sub-fossil chironomids and sediment organic content. A quantitative reconstruction of mean July air temperature (MJAT) was developed using a regional training set and a chironomid-based WA-PLS inference model (r 2 jack = 0.55, RMSEP = 0.9°C). The chironomid-based MJAT reconstruction …
A multi-proxy paleolimnology study of the impact of climate change and atmospheric pollutant loadings on aquatic ecosystems in the Great Basin, United States
Mountain Climatology
Mountain climatology is the study of processes and atmospheric phenomena caused by protrusions of the lithosphere into the atmosphere. The nature and scale of these processes varies, as do the effects, depending on the type of mountains involved and location relative to prevailing winds. Fundamentally, mountains have vertically heterogeneous climatic zones, often capped by snow and ice. The diversity of mountain climates preside over Earth's most…
The significance of mountain glaciers as sentinels of climate and environmental change
Mountain glaciers are transient hydrologic reservoirs persisting at the habitable extremes of Earth that both document and respond to climate change. They withhold water in solid phase from other reservoirs and ultimately impact sea levels. Moreover, they are valued resources with economic and cultural significance for human societies living below them. They also preserve histories of past climates. Yet, when climate change forces glaciers to los…
Impacts of Glacier Recession and Declining Meltwater on Mountain Societies
Glacierized mountains are often referred to as our world's water towers because glaciers both store water over time and regulate seasonal stream flow, releasing runoff during dry seasons when societies most need water. Ice loss thus has the potential to affect human societies in diverse ways, including irrigation, agriculture, hydropower, potable water, livelihoods, recreation, spirituality, and demography. Unfortunately, research focusing on the…
A lake sediment–based paleoecological reconstruction of late Holocene fire history and vegetation change in Great Basin National Park, Nevada, USA
Analyses of macroscopic charcoal, sediment geochemistry (%C, %N, C/N, δ 13 C, δ 15 N), and fossil pollen were conducted on a sediment core recovered from Stella Lake, Nevada, establishing a 2000 year record of fire history and vegetation change for the Great Basin. Charcoal accumulation rates (CHAR) indicate that fire activity, which was minimal from the beginning of the first millennium to AD 750, increased slightly at the onset of the Medieval …
Effectiveness of Billion Trees Tsunami Afforestation Projects in restoration of forests in Pakistan
The history of forest cover dynamics in Pakistan reveals an unsatisfactory environmental situation. In the past 5 decades, particularly during the period between 1990 and 2010, the country lost an average of 41,100 hectares of green cover with a deforestation rate of 1.6% per year. The factors behind that this high deforestation rate is numerous including socio-economic transformation after the major political change during the 1970s in the mount…
Geography (13 works) · Physical geography (13 works) · Climate change (11 works) · Environmental Science (9 works) · Geology (9 works) · Oceanography (8 works) · Cryospheric studies and observations (7 works) · Geology and Paleoclimatology Research (7 works) · Geology (6 works) · Glacier (6 works)