Accelerated retreat of coastal glaciers in the Western Prince William Sound, Alaska

Maraldo, Dean R.

doi:10.1080/15230430.2020.1837715

Cited by 3 publications

(2 citation statements)

References 68 publications

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“…In particular, during those years Bear Glacier and Pedersen Glacier experienced greater net retreats than tidewater Northwestern Glacier's retreat in the 1990s, which was both the longest and fastest tidewater glacier retreat that we observed. These large retreats are consistent with observations of lake-terminating Ellsworth and Excelsior glaciers in nearby Sargent Icefield, which have also retreated rapidly after exposing over-deepened beds (Molnia, 2007; Maraldo, 2020). These rapid retreats could result in increased ice loss from higher elevations as occurred at Yakutat Glacier.…”

Section: Discussionsupporting

confidence: 86%

Maritime glacier retreat and terminus area change in Kenai Fjords National Park, Alaska, between 1984 and 2021

Black

Kurtz

2022

J. Glaciol.

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Glacier change in Kenai Fjords National Park in southcentral Alaska affects local terrestrial, fresh water and marine ecosystems and will likely impact ecotourism. We used Landsat 4–8 imagery from 1984 through 2021 to manually map lower glacier ice margins for 19 maritime glaciers in Kenai Fjords National Park. Of these glaciers, six are tidewater, three are lake-terminating, six are land-terminating and four terminated in more than one environment throughout the study period. We used the mapped ice margins to quantify seasonal terminus position and areal change, including distinguishing between ice loss at glacier termini and along glacier margins. Overall, 13 glaciers substantially retreated (more than 2σ), 14 lost substantial area and only two underwent both net advance and area gain. The glaciers that had insubstantial length and area changes were predominantly tidewater. Cumulatively, the lower reaches of these 19 glaciers lost 42 km2 of ice, which was nearly evenly distributed between the terminus and the lateral margins. The rapid rate of glacier change and subsequent land cover changes are highly visible to visitors and locals at Kenai Fjords National Park, and this study quantifies those changes in terms of glacier length and area.

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Section: Discussionsupporting

confidence: 86%

Maritime glacier retreat and terminus area change in Kenai Fjords National Park, Alaska, between 1984 and 2021

Black

Kurtz

2022

J. Glaciol.

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“…In results, these eco-climatic zones of the Himalaya are most sensitive towards climatic change (Yao et al, 2018). Any changes in climatic factors may in uence the species redistribution (Parmesan, 2006;Chen, 2011;Bond et al, 2015;Guo et al, 2018), ooding (Tabari, 2020), glacier retreat (Maraldo, 2020) and damage to agroecosystems (Li et al, 2022). Wherein, temperature and precipitation are two of the most critical parameters among the challenges posed by the climate change, that are frequently used to quantify the extent and magnitude of variability and climate change (Rana et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Time series analysis of variability and trends in precipitation on annual, seasonal and monthly scales of Jammu region of Western Himalaya from 1925-2020

Khan

Jaral

Verma

2022

Preprint

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Planning agricultural practises relies entirely on the timely prediction of rainfall based on data analysis. Early forecasting aids in the preparation of disaster management plans in high-risk locations in the event of predicted severe or limited rainfall. In this study, we analyzed the trends of precipitation and climatic variability for of Jammu region from 1925-2020. The non-parametric Mann-Kendall test was used to analyze the significance of trends in precipitation data on monthly seasonal and annual scales, whereas the non-parametric Sens’s estimator of the slope was used to quantify the magnitude of climatic trends. The results revealed that the Jammu region shows a statistically significant positive (p <0.005) for annual mean precipitation. In annual trend magnitude, the Jammu region showed a statistically significant increasing trend of 0.5260079 mm a-1 for the observed 95 years' climatic time series. The seasonal trends of precipitation statistics exhibit statistically significant positive trends over the observed time series in the case of the summer season only. Further, a significant precipitation increase of 1.484841 mm-1 was observed for the summer season only. The results of Pettit’s test for detecting annual change points for precipitation show a statistically significant change in the years 1988, 1951, and 1985 and seasonally in the year 1993 for the summer season only. Further, the results of the Mann–Kendall test for detecting monthly trends in the precipitation variables for the 95 years of observed climatic time series exhibit a statistically significant increasing trend for the months of May, June, August, and November. The results of this study are extremely useful in many sectors including agriculture, water resources, and most notably climatology studies in most striking aspects of developmental planning in recent times.

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Ecophysiological Responses of the Intertidal Seaweed Fucus Distichus to Temperature Changes and Reduced Light Driven by Tides and Glacial Input

Umanzor

Sandoval‐Gil

Conitz

2023

Estuaries and Coasts

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Climate change is influencing the performance and distribution of macroalgae in the marine environment. Although intertidal seaweeds successfully adapt to extreme and rapid abiotic changes, exposure to persistent or prolonged potentially stressful conditions can affect their vitality and productivity. Rapid glacial melt can severely alter seawater physicochemical characteristics for shallow and intertidal seaweed communities on the Alaskan coasts. Understanding how intertidal macroalgae respond to this complex mosaic of stressors is key to assessing their ability to adapt to a climate change scenario. This study assessed whether specific stress responses and acclimation mechanisms were exhibited by the intertidal brown seaweed Fucus distichus subsp. evanescence may enable it to cope with changing temperatures and reduced light availability linked to tides and glacial inputs. We analyzed its physiological performance, including photobiological variables, nutrient content, nitrate uptake, and oxidative stress descriptors under strictly controlled laboratory conditions. Results show that this subspecies of Fucus distichus may be relatively unaffected by changes in light and temperature driven by glacial melt due to the presence of pre-adapted strategies that collectively express wide physiological tolerances. Outcomes provide insights into some of the mechanisms of stress tolerance of this major structuring seaweed across the Alaskan coast. Nonetheless, glacial melt would also lower salinity in coastal water, potentially resulting in osmotic stress and other physiological effects not explored here.

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Accelerated retreat of coastal glaciers in the Western Prince William Sound, Alaska

Cited by 3 publications

References 68 publications

Maritime glacier retreat and terminus area change in Kenai Fjords National Park, Alaska, between 1984 and 2021

Maritime glacier retreat and terminus area change in Kenai Fjords National Park, Alaska, between 1984 and 2021

Time series analysis of variability and trends in precipitation on annual, seasonal and monthly scales of Jammu region of Western Himalaya from 1925-2020

Ecophysiological Responses of the Intertidal Seaweed Fucus Distichus to Temperature Changes and Reduced Light Driven by Tides and Glacial Input

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