Zobrazeno 1 - 10
of 123
pro vyhledávání: '"K. Satheesan"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 4215-4227 (2023)
Winds from two wind-profiling radars, ESRAD (ESrange atmospheric RADar) in Arctic Sweden and MARA (Moveable Atmospheric Radar for Antarctica) on the coast of Antarctica, are compared with collocated (within 100 km) winds measured by the Doppler lidar
Externí odkaz:
https://doaj.org/article/b2f59522bbe1425290e51009c405139f
Autor:
Siddarth Shankar Das, K. Kishore Kumar, K. V. Subrahmanyam, M. Venkat Ratnam, K. V. Suneeth, S. V. Sunilkumar, P. R. Sinha, Asish Kumar Ghosh, Subrata Kumar Das, Sunil Sonwabne, U. V. Muralikrishna, Yogesh Kolte, Manish Naja, S. Abhilash, K. Satheesan, V. Rakesh, P. Mahesh, N. Koushik, P. R. Satheesh Chandran, I. A. Girach, K. V. S. Namboodiri, G. Pandithurai, N. V. P. Kirankumar
Publikováno v:
Earth and Space Science, Vol 10, Iss 9, Pp n/a-n/a (2023)
Abstract An integrated campaign “Suryagrahan‐2019” with multi‐institutional support was conducted by launching a series of radiosondes/ozonesondes over 6‐different locations in India along with the operation of ST/MST radars and launching o
Externí odkaz:
https://doaj.org/article/0d58f8845c9245ea848c1ba65bcb8930
Autor:
E. Belova, S. Kirkwood, P. Voelger, S. Chatterjee, K. Satheesan, S. Hagelin, M. Lindskog, H. Körnich
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5415-5428 (2021)
Winds measured by lidar from the Aeolus satellite are compared with winds measured by two ground-based radars – MARA in Antarctica (70.77∘ S, 11.73∘ E) and ESRAD (67.88∘ N, 21.10∘ E) in Arctic Sweden – for the period 1 July–31 December
Externí odkaz:
https://doaj.org/article/7c3b6381beba400d85db29ccecbcb54a
Autor:
E. Belova, P. Voelger, S. Kirkwood, S. Hagelin, M. Lindskog, H. Körnich, S. Chatterjee, K. Satheesan
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 2813-2825 (2021)
Two atmospheric VHF radars: ESRAD (Esrange MST radar) located near Kiruna in the Swedish Arctic and MARA (Moveable Atmospheric Radar for Antarctica) at the Indian research station Maitri in Antarctica perform wind measurements in the troposphere and
Externí odkaz:
https://doaj.org/article/f69dca54609f4c2caaf18e38bd633a1f
Publikováno v:
Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 72, Iss 1, Pp 1-15 (2020)
Winter (DJF) temperature and precipitation variability in an Arctic Archipelago, Svalbard is investigated for an extreme event during December 2015 as well as on interannual time scales. During December 2015–16, a strong high pressure anomaly over
Externí odkaz:
https://doaj.org/article/ac224ef0763443409cc4c86903b79843
Autor:
S. Kirkwood, E. Belova, P. Dalin, M. Mihalikova, D. Mikhaylova, D. Murtagh, H. Nilsson, K. Satheesan, J. Urban, I. Wolf
Publikováno v:
Annales Geophysicae, Vol 31, Pp 333-347 (2013)
The relationship between polar mesosphere summer echoes (PMSE) and geomagnetic disturbances (represented by magnetic K indices) is examined. Calibrated PMSE reflectivities for the period May 2006–February 2012 are used from two 52.0/54.5 MHz rad
Externí odkaz:
https://doaj.org/article/d30909ac2af54139a01f54651e8ed28d
Autor:
K. Satheesan
Publikováno v:
Tellus: Series B, Chemical and Physical Meteorology, Vol 64, Iss 0, Pp 1-7 (2012)
Potential of finding a robust tracer–tracer relation using an approach based on fuzzy logic in the Arctic stratosphere using satellite observations of O3 and N2O has been demonstrated. Using this tracer–tracer relation, O3 is predicted in terms o
Externí odkaz:
https://doaj.org/article/942e80b51ce142b3819d889f327a40cd
Publikováno v:
Annales Geophysicae, Vol 28, Pp 1993-2005 (2010)
High-resolution radiosondes and calibrated radars operating close to 50 MHz, are used to examine the relationship between the strength of radar scatter and refractive index gradient. Three radars are used, in Kiruna in Arctic Sweden, at Gadanki in
Externí odkaz:
https://doaj.org/article/7106156e747146a8818d133035303111
Autor:
K. Satheesan, S. Kirkwood
Publikováno v:
Annales Geophysicae, Vol 28, Pp 1475-1481 (2010)
Wind and turbulence estimated from MST radar observations in Kiruna, in Arctic Sweden are used to characterize turbulence in the free troposphere using data clustering and fuzzy logic. The root mean square velocity, νfca, a diagnostic of turbulen
Externí odkaz:
https://doaj.org/article/ee1bff9bc123435dadf5e26cb12d20c9
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 8, Pp 3583-3599 (2010)
We use measurements by the 52 MHz wind-profiling radar ESRAD, situated near Kiruna in Arctic Sweden, and simulations using the Advanced Research and Weather Forecasting model, WRF, to study vertical winds and turbulence in the troposphere in mountain
Externí odkaz:
https://doaj.org/article/6bffe5ee869147d2bb7c37294800b448