Temperature measurements at Brandallaguna in March 2021 ...

Bottom water temperatures in lakes and the near-shore Arctic Ocean are usually below 4°C. If the water depth is shallow enough, the sea/lake ice freezes to the sea/lake bed and may significantly shift the mean annual temperature below zero. The temperature regime below the water is therefore directl...

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Bibliographic Details
Main Authors: Miesner, Frederieke, Cable, William L, Boike, Julia
Format: Dataset
Language:English
Published: PANGAEA 2022
Subjects:
active layer
Permafrost
Svalbard
talik
Temperature
Event label
DATE/TIME
LATITUDE
LONGITUDE
ELEVATION
Temperature, soil
Temperature Lance
Modular Observation Solutions for Earth Systems MOSES
Permafrost Research AWI_Perma
Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn
Arctic
Arctic Ocean
Moses
Talik
Bayelva
Ice
permafrost
Online Access:https://dx.doi.org/10.1594/pangaea.950782
https://doi.pangaea.de/10.1594/PANGAEA.950782
Description
Summary:Bottom water temperatures in lakes and the near-shore Arctic Ocean are usually below 4°C. If the water depth is shallow enough, the sea/lake ice freezes to the sea/lake bed and may significantly shift the mean annual temperature below zero. The temperature regime below the water is therefore directly dependent on the water depth and small changes can have ahuge impact.Measurements of the sediment temperature below shallow water bodies, however, are scarce, and single temperature-chains in boreholes are not sufficient to map the spatial variability. As part of the testing phase of the MOSES project, we tested a new temperature lance to measure temperature profiles in lake sediments. The device is a 1.5m steel lancewith 30 sensors at 5cm spacing that can be pushed or hammered into the sediment. The sensors equilibrate to the surrounding sediment or water within 10min, allowing for repeat measurements to cover the spatial variability. During the spring expedition to the Bayelva long-term observatory near Ny ...

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