Daniela Krampe
A5029067865- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Winter Sports Injuries and Performance
- Atmospheric chemistry and aerosols
- Oceanographic and Atmospheric Processes
- Marine animal studies overview
- Arctic and Russian Policy Studies
- Atmospheric Ozone and Climate
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Hydrology and Watershed Management Studies
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2020-2024
Ruhrverband (Germany)
2024
Philipps University of Marburg
2017
Year-round observations of the physical snow and ice properties processes that govern pack evolution its interaction with atmosphere ocean were conducted during Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) expedition research vessel Polarstern in Ocean from October 2019 to September 2020. This work was embedded into interdisciplinary design 5 MOSAiC teams, studying atmosphere, sea ice, ocean, ecosystem, biogeochemical processes. The overall aim characterize cover...
Abstract. Data from the Multidisciplinary drifting Observatory for Study of Arctic Climate (MOSAiC) expedition allowed us to investigate temporal dynamics snowfall, snow accumulation and erosion in great detail almost whole season (November 2019 May 2020). We computed cumulative water equivalent (SWE) over sea ice based on depth density retrievals a SnowMicroPen approximately weekly measured depths along fixed transect paths. used derived SWE cover compare with precipitation sensors...
Abstract. To improve our understanding of how snow properties influence sea ice thickness retrievals from presently operational and upcoming satellite radar altimeter missions, as well to investigate the potential for combining dual frequencies simultaneously map depth thickness, a new, surface-based, fully polarimetric Ku- Ka-band (KuKa radar) was built deployed during 2019–2020 year-long MOSAiC international Arctic drift expedition. This instrument, operate both an (stare mode)...
Abstract. Wind-driven redistribution of snow on sea ice alters its topography and microstructure, yet the impact these processes radar signatures is poorly understood. Here, we examine effects over Arctic waveforms backscatter obtained from a surface-based, fully polarimetric Ka- Ku-band at incidence angles between 0∘ (nadir) 50∘. Two wind events in November 2019 during Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition are evaluated. During both events, changes...
Abstract The formation of platelet ice is well known to occur under Antarctic sea ice, where subice layers form from supercooled shelf water. In the Arctic, however, has not been extensively observed, and its morphology currently remain enigmatic. Here, we present first comprehensive, long‐term in situ observations a decimeter thick layer free‐drifting pack Central Arctic winter. Observations carried out with remotely operated underwater vehicle (ROV) during midwinter leg MOSAiC drift...
Abstract Snow plays an essential role in the Arctic as interface between sea ice and atmosphere. Optical properties, thermal conductivity mass distribution are critical to understanding complex system’s energy balance distribution. By conducting measurements from October 2019 September 2020 on Multidisciplinary drifting Observatory for Study of Climate (MOSAiC) expedition, we have produced a dataset capturing year-long evolution physical properties snow surface scattering layer, highly...
Abstract. Data from the Multidisciplinary drifting Observatory for Study of Arctic Climate (MOSAiC) expedition allowed us to investigate temporal dynamics snowfall, snow accumulation, and erosion in great detail almost whole accumulation season (November 2019 May 2020). We computed cumulative water equivalent (SWE) over sea ice based on depth (HS) density retrievals a SnowMicroPen (SMP) approximately weekly-measured depths along fixed transect paths. Hence, SWE considers surface...
Abstract Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry‐derived thickness. During winter the MOSAiC Expedition, “KuKa” dual‐frequency, fully polarized Ku‐ Ka‐band radar was deployed “stare” nadir‐looking mode to investigate possibility combining these two frequencies retrieve snow depth. Three approaches were investigated: dual‐polarization waveform shape, compared independent measurements. Novel yielded r 2 values up 0.77....
<title>Abstract</title> The water isotope composition of the winter snow cover on Arctic sea ice is strongly enriched in heavy isotopes near snow-sea interface, incompatible with typical enrichment values through metamorphism processes alone. Our stratigraphic investigations from MOSAiC expedition, using computed tomography combined isotopic analyses snow, highlight that approximately 20% snowpack not meteoric origin but created ice. Here, we show sublimation under high-temperature gradients...
Abstract The Pantanal is the largest tropical wetland on planet, and yet little information available biome's carbon cycle. We used an automatic station to measure soil CO 2 concentrations oxidation‐reduction potential over 2014 2015 flood cycles of a tree island in that immune inundation during wetland's annual flooding. concentration profile was then estimate efflux two periods. In 2014, subsurface saturation at 0.30 m depth created conditions layer led buildup close 200,000 ppm below −300...
Abstract. Wind transport alters the snow topography and microstructure on sea ice through redistribution controlled by deposition erosion. The impact of these processes radar signatures is poorly understood. Here, we examine effects Arctic from Ka- Ku-band signatures. Measurements were obtained during two wind events in November 2019 MOSAiC expedition. During both events, changes waveforms backscatter coincident with surface height measured a terrestrial laser scanner are observed. At...
Abstract. To improve our understanding of how snow properties influence sea ice thickness retrievals from presently operational and upcoming satellite radar altimeter missions, as well investigating the potential for combining dual frequencies to simultaneously map depth thickness, a new, surface-based, fully-polarimetric Ku- Ka-band (KuKa radar) was built deployed during 2019–2020 year-long MOSAiC International Arctic drift expedition. This instrument, operate both an (stare mode)...
Abstract. Reliable and detailed snow data are limited in the Arctic. We aim at overcoming this issue by addressing two questions: (1) Can reanalysis ERA5 replace situ measurements high latitudes to drive models? (2) Alpine model Crocus simulate reliably Arctic depth stratigraphy? compare atmospheric evaluate simulated measured depth, density specific surface area (SSA) northeast Greenland (October 2014–October 2018). To account for differences between region, we introduce a new...
The energy and mass balance of mountain glaciers translate into volume changes that play out as area over time. From this, together with former moraines during maximum advances, information on past climate conditions the climatic drivers behind glacier advances can be obtained. Here, we use distributed COupled Snowpack Ice surface model in PYthon (COSIPY) to simulate present state an Italian glacier, named Fürkeleferner, for years 2013–2017. Next, investigate local time last “Little Age”...
Photochemical release of iodine from snow has been suggested as a source reactive to the Arctic atmosphere, however understanding underlying mechanism and potential strength is hindered by lack measurements concentration speciation in snow. Moreover, origin also unknown. Here, we report on sea ice at range depths 177 samples, representing 80 sampling events, December 2019 October 2020 collected during Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition. We...
Reliable and detailed measurements of atmospheric snow conditions in the Arctic are limited. While modern reanalyses could potentially replace former, latter can be principally simulated by dedicated modelling. However, because uncertainties modelling still exceptionally large at high latitudes, a thorough analysis performance model simulations required. Specifically, we aim to answer following questions for Villum Research Station (VRS), northeast Greenland: (1) What predominant...