Tracking hydrological responses of a thermokarst lake in the Old Crow Flats (Yukon Territory, Canada) to recent climate variability using aerial photographs and paleolimnological methods

2011 ◽  
Vol 26 (1) ◽  
pp. 117-129 ◽  
Author(s):  
Lauren A. MacDonald ◽  
Kevin W. Turner ◽  
Ann M. Balasubramaniam ◽  
Brent B. Wolfe ◽  
Roland I. Hall ◽  
...  
Keyword(s):  
Climate Variability ◽  
Yukon Territory ◽  
Aerial Photographs ◽  
Thermokarst Lake ◽  
Hydrological Responses ◽  
Recent Climate ◽  
Paleolimnological Methods ◽  
Old Crow Flats

Spatiotemporal evidence of recent climate variability in Ghana

2017 ◽  
Vol 38 (2) ◽  
pp. 172-190 ◽  
Author(s):  
Samuel Adu-Prah ◽  
Seth Appiah-Opoku ◽  
Dacosta Aboagye
Keyword(s):  
Climate Variability ◽  
Recent Climate

scholarly journals Correction: Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada)

2021 ◽  
pp. 1-3
Author(s):  
Jana M.E. Tondu ◽  
Kevin W. Turner ◽  
Johan A. Wiklund ◽  
Brent B. Wolfe ◽  
Roland I. Hall ◽  
...  
Keyword(s):  
Thermokarst Lake ◽  
Old Crow Flats

scholarly journals EXPLORING STRIP INTERCROPPING POTENTIALS OF MAIZE-PULSE CROPS TO FIGHT CLIMATE VARIABILITY IMPACTS IN DRYLAND AREAS

2017 ◽  
Vol 5 (1) ◽  
pp. 1 ◽  
Author(s):  
I Komang Damar Jaya ◽  
Sudirman Sudirman ◽  
Rosmilawati Rosmilawati
Keyword(s):  
Climate Variability ◽  
Relative Yield ◽  
Field Capacity ◽  
Cost Ratio ◽  
Maize Production ◽  
Growing Period ◽  
Pulse Crops ◽  
Growing Seasons ◽  
Recent Climate ◽  
Strip Intercropping

Recent climate variability affects maize production in dryland areas. This study aimed to explore potentials of strip intercropping of maize-pulse crops in improving productivity of dryland areas. The study was conducted in dryland area of Gumantar village, North Lombok (8.253654 S, 116.285695 E). Soil in that area was categorized as poor soil with the following properties: 0.46% organic matter, 0.05% N total (Kejdhal), available P 11.25 ppm (Olsen) and exchangeable K 0.77 me%, pH 7.0 and field capacity 29% (%/V). Rainfall data were collected during the growing seasons of 2016/2016 and 2016/2017. A field experiment of maize-pulse crops strip intercropping was conducted during a dry season of 2016. The component crops in the strip intercropping were maize NK212, maize NK7328, mungbean Vima-1 and groundnut Hypoma-1. All component crops were grown as monocropping and strip intercropping of maize-pulse crops in 8.4 x 5.0m plot size for each treatment. To measure productivity of the strip intercropping, relative yield total (RYT) and benefit to cost ratio (B/C) were calculated. They were great variations in rainfall in the last two years. From the experiment, data showed that all the strip intercropping treatments have RYT and B/C values >1 meaning that strip intercropping of maize-pulse crops is more productive than monocropping and is feasible to be practiced in dryland areas. With the short growing period and their drought tolerant nature of the pulse crops, especially mungbean, the strip intercropping can be used to fight climate variability impacts in dryland areas.

scholarly journals Rapid retreat of permafrost coastline observed with aerial drone photogrammetry

2019 ◽  
Vol 13 (5) ◽  
pp. 1513-1528 ◽  
Author(s):  
Andrew M. Cunliffe ◽  
George Tanski ◽  
Boris Radosavljevic ◽  
William F. Palmer ◽  
Torsten Sachs ◽  
...  
Keyword(s):  
Coastal Erosion ◽  
Average Rate ◽  
Temporal Frequency ◽  
Shoreline Change ◽  
Yukon Territory ◽  
Aerial Photographs ◽  
The Arctic ◽  
Storm Events ◽  
Short Term

Abstract. Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images, and historic aerial photographs, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk – Herschel Island, Yukon Territory, in the Canadian Beaufort Sea. This coastline is adjacent to a gravel spit accommodating several culturally significant sites and is the logistical base for the Qikiqtaruk – Herschel Island Territorial Park operations. In this study we sought to (i) assess short-term coastal erosion dynamics over fine temporal resolution, (ii) evaluate short-term shoreline change in the context of long-term observations, and (iii) demonstrate the potential of low-cost lightweight unmanned aerial vehicles (“drones”) to inform coastline studies and management decisions. We resurveyed a 500 m permafrost coastal reach at high temporal frequency (seven surveys over 40 d in 2017). Intra-seasonal shoreline changes were related to meteorological and oceanographic variables to understand controls on intra-seasonal erosion patterns. To put our short-term observations into historical context, we combined our analysis of shoreline positions in 2016 and 2017 with historical observations from 1952, 1970, 2000, and 2011. In just the summer of 2017, we observed coastal retreat of 14.5 m, more than 6 times faster than the long-term average rate of 2.2±0.1 m a−1 (1952–2017). Coastline retreat rates exceeded 1.0±0.1 m d−1 over a single 4 d period. Over 40 d, we estimated removal of ca. 0.96 m3 m−1 d−1. These findings highlight the episodic nature of shoreline change and the important role of storm events, which are poorly understood along permafrost coastlines. We found drone surveys combined with image-based modelling yield fine spatial resolution and accurately geolocated observations that are highly suitable to observe intra-seasonal erosion dynamics in rapidly changing Arctic landscapes.

Recent climate variability and its impacts on soybean yields in Southern Brazil

2010 ◽  
Vol 105 (1-2) ◽  
pp. 83-97 ◽  
Author(s):  
Danielle Barros Ferreira ◽  
V. Brahmananda Rao
Keyword(s):  
Climate Variability ◽  
Southern Brazil ◽  
Recent Climate

Forest cover change, climate variability, and hydrological responses

Ecohydrology ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. e1847 ◽  
Author(s):  
Xiaohua Wei ◽  
Rita Winkler ◽  
Ge Sun
Keyword(s):  
Climate Variability ◽  
Forest Cover ◽  
Forest Cover Change ◽  
Hydrological Responses ◽  
Change Climate
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