Zobrazeno 1 - 10
of 105
pro vyhledávání: '"David K. Swanson"'
Publikováno v:
Ecosphere, Vol 14, Iss 7, Pp n/a-n/a (2023)
Abstract Mean annual air temperature has been increasing in Alaska since the 1970s and is expected to continue to increase through the current century, resulting in significant environmental changes (e.g., permafrost thaw, shifts in vegetation commun
Externí odkaz:
https://doaj.org/article/aa0773d328ff400293d3f9be98aed92a
Autor:
Jeremy D. Mizel, David K. Swanson
Publikováno v:
Arctic, Antarctic, and Alpine Research, Vol 54, Iss 1, Pp 25-39 (2022)
Shrub expansion is among the most conspicuous of the warming-related phenomena occurring within tundra regions, but its effects on vertebrates are not well understood. Among passerines, the habitats of shrub- and tundra-adapted species are expected t
Externí odkaz:
https://doaj.org/article/cf940879d5054724aa129ac78a3ea700
Publikováno v:
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 1-19 (2021)
Rising temperatures in the Arctic can result in thaw of permafrost, with widespread implications for ecosystems and infrastructure. We analyzed mean annual air and ground temperatures in the eight northernmost national parks in Alaska using data from
Externí odkaz:
https://doaj.org/article/d62c969ace3544b28bccf936794a59bc
Autor:
David K. Swanson
Publikováno v:
Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 265-279 (2019)
Lakes and ponds are important ecosystem components in arctic lowlands, and they are prone to rapid changes in surface area by thermokarst expansion and by sudden lake drainage. The 30 m resolution Landsat record (1984–2018) was used to derive a rec
Externí odkaz:
https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5
Autor:
David K. Swanson
Publikováno v:
Remote Sensing, Vol 13, Iss 13, p 2554 (2021)
Daily Normalized Difference Vegetation Index (NDVI) values from the MODIS Aqua and Terra satellites were compared with on-the-ground camera observations at five locations in northern Alaska. Over half of the spring rise in NDVI was due to the transit
Externí odkaz:
https://doaj.org/article/bb0e06b738834d84832360d499757d5d
Autor:
David K. Swanson, Matt Nolan
Publikováno v:
Remote Sensing, Vol 10, Iss 7, p 983 (2018)
We monitored the growth of 22 retrogressive thaw slumps (RTS), dramatic erosion features associated with thaw of permafrost, in the Noatak Valley of northern Alaska using high-resolution structure-from-motion digital photogrammetry. We created time-s
Externí odkaz:
https://doaj.org/article/dd25f21297e84dd1815d651d635fa16d
Publikováno v:
PLoS ONE, Vol 17, Iss 8, p e0273893 (2022)
Bering Land Bridge National Preserve and Cape Krusenstern National Monument in northwest Alaska have approximately 1600 km of predominantly soft-sediment coastlines along the Chukchi Sea, a shallow bay of the Arctic Ocean. Over the past decade, marin
Externí odkaz:
https://doaj.org/article/9613f774dc0d48e18c35e493d5a3ffdb
Publikováno v:
Biometrics.
Autor:
Ann M. Raiho, Henry R. Scharf, Carl A. Roland, David K. Swanson, Sarah E. Stehn, Mevin B. Hooten
Publikováno v:
Diversity and Distributions. 28:793-809
Autor:
David K. Swanson
Publikováno v:
Frontiers for Young Minds. 10
In the Arctic, the ground is frozen most of the year. Only the top layer of soil thaws each summer. This frozen ground, called permafrost, contains a lot of frozen water (ice). There are many small lakes in the Arctic, in low spots formed from melted