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Meteorological synoptical observations from station Ny-Ålesund (2007-11)

Publication Date
DOI: 10.1594/pangaea.695549
  • Anemometer
  • Barometer
  • Baseline Surface Radiation Network
  • Bsrn
  • Ceilometer
  • Cloud Base Height
  • Dew/Frost Point
  • High Cloud
  • Horizontal Visibility
  • Hygrometer
  • Low/Middle Cloud Amount
  • Low Cloud
  • Middle Cloud
  • Monitoring Station
  • Nya
  • Ny-Ålesund
  • Ny-Ålesund
  • Spitsbergen
  • Ny-Alesund Are Synonym For Ny-Ålesund
  • Past Weather1
  • Present Weather
  • Pressure
  • Atmospheric
  • Temperature
  • Air
  • Thermometer
  • Total Cloud Amount
  • Visibility Sensor
  • Visual Observation
  • Wcrp/Gewex
  • Wind Direction
  • Wind Speed
  • Chemistry


gl014548 1..4 Large NAT particle formation by mother clouds: Analysis of SOLVE/ THESEO-2000 observations S. Fueglistaler,1 B. P. Luo,1 S. Buss,1 H. Wernli,1 C. Voigt,1 M. Mu¨ller,2 R. Neuber,2 C. A. Hostetler,3 L. R. Poole,3 H. Flentje,4 D. W. Fahey,5,6 M. J. Northway,5,6 and Th. Peter1 Received 11 December 2001; revised 13 March 2002; accepted 13 March 2002; published 29 June 2002. [1] During the SOLVE/THESEO-2000 Arctic stratospheric campaign in the winter 1999/2000 widespread occurrences of very large HNO3-containing particles, probably composed of nitric acid trihydrate (NAT), were observed in situ by instruments on board the ER-2 stratospheric research aircraft. These large NAT particles were found with low number densities (n � 10�4 cm�3) in vast regions, in air generally supersaturated with respect to NAT. Within the same campaign other instruments have performed airborne and ground-based measurements of polar stratospheric clouds (PSCs), often showing the existence of type 1a and type 1a-enh clouds. Such PSCs often occur on the mesoscale with particle number densities n ^ 10�2cm�3 and are also most likely composed ofNAT.We use forward trajectories for the path of NAT particles, which are advected by winds based on ECMWF analyses and sediment due to gravity, to show that high number density NAT PSCs (mother clouds) could give rise to low number density NAT particle populations several days downstream. INDEXTERMS: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0320 Atmospheric Composition and Structure: Cloud physics and chemistry; 0341 Atmospheric Composition and Structure: Middle atmosphere—constituent transport and chemistry (3334) 1. Introduction [2] Ozone destruction is promoted by PSCs in two impor- tant ways. First, their surfaces host heterogeneous reactions which cause chlorine activation. Second, PSCs can remove HNO3 through sedimentation, a process termed denitrifica- tion. Based on lidar observations by Browell et al. [1990

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