Modelling net radiation in a High Arctic environment using summer field camp data

Young, Kathy L.; Woo, Ming‐ko

doi:10.1002/(sici)1097-0088(199709)17:11<1211::aid-joc194>3.0.co;2-z

Cited by 5 publications

(8 citation statements)

References 40 publications

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“…A relatively deep water column, cool temperatures, and higher average seasonal albedo than the Plateau pond reduced energy availability for evaporation. While these evaporation rates are typical of other ponds in both the Subarctic and High Arctic (e.g., Young and Woo, 2003;Woo and Guan, 2006), they are slightly lower than rates for the other ponds in this study. the response to precipitation inputs and evaporation losses cannot adequately explain the apparent increase of the water level in the Moraine pond at the beginning of the study season or its general stability throughout the season.…”

Section: Snowcover and Meltcontrasting

confidence: 60%

“…Elevated plateau areas tend to be windswept in this treeless environment, while much snow can collect in depressions and lee of slopes, giving rise to late-lying or perennial snowbeds (Young and Lewkowicz, 1990). Previously, Young and Woo (2003) and Woo and Young (2003) demonstrated that meltwater from these features can be effective in sustaining water levels in patchy wetlands downslope. A detailed snow survey was conducted on one late-lying snowbed located to the west of the Moraine study pond.…”

Section: Precipitation (Snow and Rainfall)mentioning

confidence: 99%

“…10). According to Young and Woo (2003), the prolonged snowmelt of these snowbeds allows additional meltwater inputs during the post-snowmelt season. this particular snowbed provided meltwater from 25 June to 14 July in 2005 and similarly from 26 June till 13 July in 2006.…”

Section: Post-snowmelt: Steady Hydrological Linkages (Moraine Pond)mentioning

confidence: 99%

“…No rain occurred during this time, so ground ice melt is the only source possible. According to Young and Woo (2000), ground ice can be a significant storage term in the water balance equation and can be an important source of water after snowmelt. Young and Woo (2000) found that the largest contribution of ground ice moisture occurred right after snowmelt and came from ice-rich organic soils.…”

Section: Intermittent Hydrologic Linkages: Bedrock and Plateau Pondsmentioning

confidence: 99%

“…According to Young and Woo (2000), ground ice can be a significant storage term in the water balance equation and can be an important source of water after snowmelt. Young and Woo (2000) found that the largest contribution of ground ice moisture occurred right after snowmelt and came from ice-rich organic soils. because the water pulse occurs later in the season, ground ice-melt likely originates from an ice-rich zone near the interface of the active layer and the uppermost portion of the permafrost table.…”

Section: Intermittent Hydrologic Linkages: Bedrock and Plateau Pondsmentioning

confidence: 99%

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Sustainability of High Arctic Ponds in a Polar Desert Environment

Abnizova¹,

Young²

2010

ARCTIC

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AbStRACt. Arctic wetland environments are sensitive to ongoing climate change as seen by the recent loss of lakes and ponds in southern Alaska, Siberia, and northern Ellesmere island, Canada. A clearer picture of the mechanisms accounting for these losses or the persistence of ponds is presently required. to better understand and quantify the hydrologic processes that are leading to the sustainability or demise of High Arctic ponds, a detailed study was conducted during the summer seasons of 2006 at Somerset Island, Nunavut (72˚43' N, 94˚15' W). A water balance framework that quantifies water inputs, losses, and storage was employed on four ponds situated in three broad geomorphic areas (coastal, bedrock, and glacial terrain, which includes plateau and moraine). The initial snow cover amount influenced the water level pattern for the summer season. Large end-of-winter snow accumulations in the deep bedrock pond ensured large initial water storage and seasonal sustainability despite variable climatic conditions and a coarse substrate, which encouraged subsurface outflow. Connectivity to a stream draining an upland area and a melting late-lying snowbed nearby allowed the small Moraine pond to maintain stable water levels throughout both years. Sandy soils typical of the Coastal and Plateau ponds favored seepage and subsurface water losses, leading to desiccation of these ponds during dry periods. Lateral water losses from the Coastal pond were enhanced by the presence of a downslope frost crack that formed a steep hydraulic gradient with the pond. High initial snowfall and substantial rain maintain pond water levels, but in years with low snowfall and dry conditions, ponds are vulnerable to disappearance unless a range of dependable hydrological linkages exists.Key words: Arctic hydrology, climate change, connectivity, low-gradient wetland, sustainability RÉSuMÉ. Les milieux humides de l'Arctique sont sensibles aux changements climatiques continus, tel que l'atteste la perte récente de lacs et d'étangs du sud de l'Alaska, de la Sibérie et du nord de l'île d'Ellesmere, au Canada. À l'heure actuelle, il faut obtenir une meilleure idée des mécanismes à la source de ces pertes ou à la source de la persistance des étangs. Afin de mieux comprendre et de quantifier les processus hydrologiques qui entraînent la durabilité ou la disparition des étangs de l'Extrême arctique, une étude détaillée a été réalisée au cours des étés 2005 et 2006 à l'île Somerset, au Nunavut (72˚43' N, 94˚15' O). À quatre étangs situés dans trois grandes zones géomorphologiques (côtière, roche de fond et terrain glaciaire, ce qui comprend plateaux et moraines), on a utilisé un cadre de référence de bilan hydrique quantifiant les gains, les pertes et le stockage d'eau. La quantité de couverture de neige initiale exerçait une influence sur le modèle de niveau d'eau pendant la saison d'été. Les fortes accumulations de neige en fin d'hiver dans la profonde roche de fond des étangs donnaient lieu à un important stockage initial de l'eau et à la durabi...

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Section: Snowcover and Meltcontrasting

confidence: 60%

Section: Precipitation (Snow and Rainfall)mentioning

confidence: 99%

Section: Post-snowmelt: Steady Hydrological Linkages (Moraine Pond)mentioning

confidence: 99%

Section: Intermittent Hydrologic Linkages: Bedrock and Plateau Pondsmentioning

confidence: 99%

Section: Intermittent Hydrologic Linkages: Bedrock and Plateau Pondsmentioning

confidence: 99%

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