Ozon; Wasserdampf; Temperature; Windgeschwindigkeit; Fernerkundung; Remote Sensing; Mikrowellen-Radiometrie; Klima
Fernandez Susana, Murk Axel, Kaempfer Niklaus (2015), Design and Characterization of a Peltier-Cold Calibration Target for a 110-GHz Radiometer, in IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
, 53(1), 344-351.
Fernandez Susana, Murk Axel, Kämpfer Niklaus (2015), GROMOS-C, a novel ground based microwave radiometer for ozone measurement campaigns, in Atmospheric Measurement Techniques Discussions
, 8, 1-48.
Lainer Martin, Kämpfer Niklaus, Tschanz Brigitte, Nedoluha Gerald E., Ka Soohyun, Oh Jung Jin (2015), Trajectory mapping of middle atmospheric water vapor by a mini network of NDACC instruments, in Atmos. Chem. Phys. Discuss.
, 15(8), 12777-12819.
Navas-Guzman Francisco, Kämpfer Niklaus, Murk Axel, Larsson Richard, Buehler Stefan A., Eriksson Patrick (2015), Zeeman effect in atmospheric O2 measured by ground-based microwave radiometry, in Atmos. Meas. Tech.
, 8, 1863-1874.
Guzman Francisco Navas, Stähli Oliver, Kämpfer Niklaus (2014), An integrated approach toward the incorporation of clouds in the temperature retrievals from microwave measurements, in Atmospheric Measurement Techniques
, 7, 1619-1628.
Rüfenacht Rolf, Murk Axel, Kämpfer Niklaus, Eriksson Patrick, Buehler Stefan A. (2014), Middle-atmospheric zonal and meridional wind profiles from polar, tropical and midlatitudes with the ground-based microwave Doppler wind radiometer WIRA, in Atmos. Meas. Tech.
, 7(12), 4491-4505.
Hocke K., Studer S., Martius O., Scheiben D., Kaempfer N. (2013), A 20-day period standing oscillation in the northern winter stratosphere, in ANNALES GEOPHYSICAE
, 31(4), 755-764.
Scheiben D., Schanz A., Tschanz B., Kaempfer N. (2013), Diurnal variations in middle-atmospheric water vapor by ground-based microwave radiometry, in ATMOSPHERIC CHEMISTRY AND PHYSICS
, 13(14), 6877-6886.
Stähli Oliver, Murk Axel, Kämpfer Niklaus, Mätzler Christian, Eriksson Patrick E J (2013), Microwave radiometer to retrieve temperature profiles from the surface to the stratopause, in Atmospheric Measurement Techniques
, 6(9), 2477-2494.
Scheiben Dominik, Tschanz Brigitte, Hocke Klemens, Kämpfer Niklaus, Ka Soohyun, Oh Jung Jin (2013), The quasi 16-day wave in mesospheric water vapor during boreal winter 2011/2012, in Atmos. Chem. Phys. Discuss.
, 13, 29007-29034.
Tschanz B., Straub C., Scheiben D., Walker K. A., Stiller G. P., Kaempfer N. (2013), Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C, in ATMOSPHERIC MEASUREMENT TECHNIQUES
, 6(7), 1725-1745.
Tschanz B. and Kämpfer N., Signatures of the two day wave and sudden stratospheric warmings in Arctic water vapour observed by ground-based microwave radiometry, in Atmospheric Chemistry and Physics Discussions
, 15, 371-392.
It is well recognized that processes in the middle atmosphere are linked and interaction between different constituents take place by chemical, radiative or dynamical processes. This interplay of processes is governed by key parameters of the atmosphere, such as water vapor, ozone, temperature and wind, i.e. dynamics. We dispose over an excellent infrastructure to measure the altitude distribution of H2O and O3 in the middle atmosphere and very recently also horizontal wind and temperature by ground based microwave radiometry. Wind measurements are a novelty as no other technique worldwide has been able to measure the wind speed on a regular basis in the middle atmosphere from 30 - 80km with a ground-based instrument. Also temperature profiling in the stratosphere by microwave radiometry is a novelty. The Institute of Applied Physics at Bern acts as one of the primary stations of NDACC, Network for the Detection of Atmospheric Composition Change, and contributes with two microwave radiometers, one for ozone and the other one for water vapor. With our mobile instruments for H2O, wind and in the near future also for ozone we have a worldwide unique trio of remotely controlled radiometers that offer an excellent possibility to participate in measurement campaigns in the arctic or the tropics.The main objective of our research for the period from 1.4.2013 until 31.3.2015: •Operation of radiometers on a regular and reliable basis within NDACC•Investigation of temporal variability of the key parameters H2O, O3, temperature and wind as measured by our well established and newly developed microwave spectro-radiometers•Participation in measurement campaigns in the tropics and the arcticTemporal variability can span a wide branch of time. A particular weight will be put on the investigation of the quasi two day wave in water vapor, ozone and wind, and on the diurnal variability of H2O in the strato- and mesosphere. Data are compared with chemistry climate models such as WACCM also operated in the research group.An important aspect is the participation in measurement campaigns in the tropics and in the arctic where ground based measurements of water vapor are almost inexistent. A key campaign will certainly be the operation of our mobile instruments at the Maïdo observatory, NDACC-site at La Réunion (21°S,55°E), in conjunction with other instruments such as lidar and FTIR. The main aim of the Maïdo-campaign will be the investigation of middle atmospheric water vapor and related dynamical processes, as the quasi two day wave. A second campaign will be in the arctic, at Sodankylä, during winter 2014/15 where the main weight is on the study of sudden stratospheric warmings in addition to investigations of dynamical phenomena in water vapor in relation to the polar vortex.