Ozon; Wasserdampf; Temperatur; Windgeschwindigkeit; Klima; Mikrowellen; Radiometrie; Fernerkundung
Blanc E., Ceranna L., Hauchecorne A., Charlton-Perez A., Marchetti E., Evers L. G., Kvaerna T., Lastovicka J., Eliasson L., Crosby N. B., Le Pichon A., Brachet N., Pilger C., Keckhut P., Assink J. D., Smets P. S. M., Lee C. F., Kero J., Sindelarova T., Kampfer N., Rufenacht R., Farges T., Millet C., Nasholm S. P., Gibbons S. J., Espy P. J., Hibbins R. E., Heinrich P., Ripepe M., Khaykin S., Mze N., Chum J. (2018), Toward an Improved Representation of Middle Atmospheric Dynamics Thanks to the ARISE Project, in SURVEYS IN GEOPHYSICS
, 39(2), 171-225.
Moreira Lorena, Hocke Klemens, Kämpfer Niklaus (2018), Short-term stratospheric ozone fluctuations observed by GROMOS microwave radiometer at Bern, in Earth, Planets and Space
, 70(1), 8-8.
Lainer Martin, Hocke Klemens, Hocke Klemens, Rüfenacht Rolf, Rüfenacht Rolf, Kämpfer Niklaus, Kämpfer Niklaus (2017), Quasi 18 h wave activity in ground-based observed mesospheric H2O over Bern, Switzerland, in Atmospheric Chemistry and Physics
, 17(24), 14905-14917.
Nedoluha Gerald E., Kiefer Michael, Lossow Stefan, Michael Gomez R., Kämpfer Niklaus, Lainer Martin, Forkman Peter, Martin Christensen Ole, Jin Oh Jung, Hartogh Paul, Anderson John, Bramstedt Klaus, Dinelli Bianca M., Garcia-Comas Maya, Hervig Mark, Murtagh Donal, Raspollini Piera, Read William G., Rosenlof Karen, Stiller Gabriele P., Walker Kaley A. (2017), The SPARC water vapor assessment II: Intercomparison of satellite and ground-based microwave measurements, in Atmospheric Chemistry and Physics
, 17(23), 14543-14558.
Navas-Guzman Francisco, Kampfer Niklaus, Schranz Franziska, Steinbrecht Wolfgang, Haefele Alexander (2017), Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques, in ATMOSPHERIC CHEMISTRY AND PHYSICS
, 17(22), 14085-14104.
Bernet Leonie, Bernet Leonie, Navas-Guzmán Francisco, Kämpfer Niklaus, Kämpfer Niklaus (2017), The effect of cloud liquid water on tropospheric temperature retrievals from microwave measurements, in Atmospheric Measurement Techniques
, 10(11), 4421-4437.
Bernet Leonie, Navas-Guzman Francisco, Kampfer Niklaus (2017), The effect of cloud liquid water on tropospheric temperature retrievals from microwave measurements, in ATMOSPHERIC MEASUREMENT TECHNIQUES
, 10(11), 4421-4437.
Ruefenacht Rolf, Kampfer Niklaus (2017), The importance of signals in the Doppler broadening range for middle-atmospheric microwave wind and ozone radiometry, in JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
, 199, 77-88.
Steinbrecht Wolfgang, Froidevaux Lucien, Fuller Ryan, Wang Ray, Anderson John, Roth Chris, Bourassa Adam, Degenstein Doug, Damadeo Robert, Zawodny Joe, Frith Stacey, McPeters Richard, Bhartia Pawan, Wild Jeannette, Long Craig, Davis Sean, Rosenlof Karen, Sofieva Viktoria, Walker Kaley, Rahpoe Nabiz, Rozanov Alexei, Weber Mark, Laeng Alexandra, von Clarmann Thomas, Stiller Gabriele, Kramarova Natalya, Godin-Beekmann Sophie, Leblanc Thierry, Querel Richard, Swart Daan, Boyd Ian, Hocke Klemens, Kampfer Niklaus, Barras Eliane Maillard, Moreira Lorena, Nedoluha Gerald, Vigouroux Corinne, Blumenstock Thomas, Schneider Matthias, Garcia Omaira, Jones Nicholas, Mahieu Emmanuel, Smale Dan, Kotkamp Michael, Robinson John, Petropavlovskikh Irina, Harris Neil, Hassler Birgit, Hubert Daan, Tummon Fiona (2017), An update on ozone profile trends for the period 2000 to 2016, in ATMOSPHERIC CHEMISTRY AND PHYSICS
, 17(17), 10675-10690.
Moreira Lorena, Hocke Klemens, Kämpfer Niklaus (2017), Comparison of ozone profiles and influences from the tertiary ozone maximum in the night-to-day ratio above Switzerland, in Atmospheric Chemistry and Physics
, 17(17), 10259-10268.
Hocke Klemens, Schranz Franziska, Maillard Barras Eliane, Moreira Lorena, Kämpfer Niklaus (2017), An Atlantic streamer in stratospheric ozone observations and SD-WACCM simulation data, in Atmospheric Chemistry and Physics
, 17(5), 3445-3452.
Ruefenacht Rolf, Hocke Klemens, Kaempfer Niklaus (2016), First continuous ground-based observations of long period oscillations in the vertically resolved wind field of the stratosphere and mesosphere, in ATMOSPHERIC CHEMISTRY AND PHYSICS
, 16(8), 4915-4925.
Navas-Guzman Francisco, Kampfer Niklaus, Haefele Alexander (2016), Validation of brightness and physical temperature from two scanning microwave radiometers in the 60GHz O-2 band using radiosonde measurements, in ATMOSPHERIC MEASUREMENT TECHNIQUES
, 9(9), 4587-4600.
Fernandez Susana, Rüfenacht Rolf, Kämpfer Niklaus, Portafaix Thierry, Posny Françoise, Payen Guillaume (2016), Results from the validation campaign of the ozone radiometer GROMOS-C at the NDACC station of Réunion island, in Atmospheric Chemistry and Physics
, 16(12), 7531-7543.
Lainer Martin, Hocke Klemens, Hocke Klemens (2016), Variability of mesospheric water vapor above Bern in relation to the 27-day solar rotation cycle, in Journal of Atmospheric and Solar-Terrestrial Physics
, 143-144, 71-87.
Moreira Lorena, Hocke Klemens, Navas-Guzmán Francisco, Eckert Ellen, von Clarmann Thomas, Kämpfer Niklaus (2016), The natural oscillations in stratospheric ozone observed by the GROMOS microwave radiometer at the NDACC station Bern, in Atmospheric Chemistry and Physics Discussions
Navas-Guzman F., Kaempfer N., Murk A., Larsson R., Buehler S. A., Eriksson P. (2015), Zeeman effect in atmospheric O-2 measured by ground-based microwave radiometry, in ATMOSPHERIC MEASUREMENT TECHNIQUES
, 8(4), 1863-1874.
Moreira L., Hocke K., Eckert E., von Clarmann T., Kämpfer N. (2015), Trend analysis of the 20-year time series of stratospheric ozone profiles observed by the GROMOS microwave radiometer at Bern, in Atmospheric Chemistry and Physics
, 15(19), 10999-11009.
Lainer M., Kämpfer N., Tschanz B., Nedoluha G. E., Oh J. J. (2015), Trajectory mapping of middle atmospheric water vapor by a mini network of NDACC instruments, in Atmospheric Chemistry and Physics
, 15(16), 9711-9730.
Le Pichon A., Assink J. D., Heinrich P., Blanc E., Charlton-Perez A., Lee C. F., Keckhut P., Hauchecorne A., Ruefenacht R., Kaempfer N., Drob D. P., Smets P. S. M., Evers L. G., Ceranna L., Pilger C., Ross O., Claud C. (2015), Comparison of co-located independent ground-based middle atmospheric wind and temperature measurements with numerical weather prediction models, in JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
, 120(16), 8318-8331.
Fernandez S., Murk A., Kämpfer N. (2015), GROMOS-C, a novel ground-based microwave radiometer for ozone measurement campaigns, in Atmospheric Measurement Techniques
, 8(7), 2649-2662.
Moreira L., Hocke K., Eckert E., von Clarmann T., Kämpfer N. (2015), Trend analysis of the 20 years time series of stratospheric ozone profiles observed by the GROMOS microwave radiometer at Bern, in Atmospheric Chemistry and Physics Discussions
, 15(12), 16371-16400.
Tschanz B., Tschanz B., Kämpfer N. (2015), Signatures of the 2-day wave and sudden stratospheric warmings in Arctic water vapour observed by ground-based microwave radiometry, in Atmospheric Chemistry and Physics
, 15(9), 5099-5108.
Processes in the middle atmosphere are linked and interactions between different constituents take place by chemical, radiative or dynamical means. Such processes also may affect the troposphere and surface climate and vice versa. This interplay is governed by key parameters of the atmosphere, such as H2O, O3, temperature and wind. The proposed research activities are based on three pillars: • excellent infrastructure for measuring key atmospheric constituents, • expertise in data retrieval techniques and modeling and finally • international cooperation and networking. During the last decade we have been successful in building up excellent infrastructure to measure the altitude distribution of water vapor, ozone, temperature and horizontal wind in the middle atmosphere, key elements of atmospheric and climate research. 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 so far. Also temperature profiling in the stratosphere by ground based microwave radiometry is a novelty. The IAP at Bern acts as one of the primary stations of NDACC (Network for the Detection of Atmospheric Composition Chang), and contributes to it with two microwave radiometers, one for ozone and the other one for water vapor. The ozone data series extends by now to more than two decades with an unprecedented time resolution of a few minutes. The possibility to study atmospheric phenomena at time scales from decades to minutes is exceptional. With the middle atmospheric water vapor radiometer we dispose over a most successful instrument that can retrieve H2O in the upper stratosphere and the mesosphere. With our mobile instruments for H2O, wind and also for O3 and CO we dispose of a worldwide unique set of remotely controlled radiometers that offer an excellent possibility to participate in measurement campaigns in the arctic or the tropics.The main objectives of our research for the period from 1.4.2015 until 31.3.2018 are: • Continued contribution to the NDACC with our instruments for H2O and O3 at Bern and at Seoul. • Investigation of temporal variability of the key parameters H2O, O3, temperature and wind: from the detection of trends to investigations of periodic structures such as the diurnal cycle, the quasi two day wave and the semi-annual oscillation in the tropics.• Characteristics of key parameters before, during and after a sudden stratospheric warming, SSW, at low, middle and high latitudes.• Realisation of a second-generation wind radiometer, WIRA-C.• Participation in measurement campaigns in the arctic (Spitzbergen) and the tropics (La Réunion)An important aspect is the participation in measurement campaigns in the tropics and in the arctic where ground based measurements of water vapor and wind are almost inexistent. A key campaign will certainly be the operation of our mobile instruments for H2O, O3, CO and wind at the polar station at Ny Alesund on Spitzbergen (79°N) where the photochemistry of ozone and water vapor shall be investigated together with dynamical processes and compared to models. Wind measurements will be continued at Maïdo observatory on La Réunion island in the frame of the EC-project ARISE.