Sodium temperature/wind lidar based on laser-diode-pumped Nd:YAG lasers deployed at Tromsø, Norway (69.6°N, 19.2°E).

An Nd:YAG laser-based sodium temperature/wind lidar was developed for the measurement of the northern polar mesosphere and lower thermosphere at Tromsø (69.6N, 19.2E), Norway. Coherent light at 589 nm is produced by sum frequency generation of 1064 nm and 1319 nm from two diode laser end-pumped pulsed Nd:YAG lasers. The output power is as high as 4W, with 4 mJ/pulse at 1000 Hz repetition rate. Five tilting Cassegrain telescopes enable us to make five-direction (zenith, north, south, east, west) observation for temperature and wind simultaneously. This highly stable laser system is first of its kind to operate virtually maintenance-free during the observation season (from late September to March) since 2010.

[1]  N. Saito,et al.  A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data , 2014 .

[2]  J. R. Yu,et al.  Simultaneous three‐frequency Na lidar measurements of radial wind and temperature in the mesopause region , 1994 .

[3]  N. Saito,et al.  A case study on generation mechanisms of a sporadic sodium layer above Tromsø (69.6 N) during a night of high auroral activity , 2015 .

[4]  C Y She,et al.  Doppler-free saturation fluorescence spectroscopy of Na atoms for atmospheric application. , 1995, Applied optics.

[5]  Takuya D. Kawahara,et al.  Sodium temperature lidar based on injection seeded Nd:YAG pulse lasers using a sum-frequency generation technique. , 2011, Optics express.

[6]  A. Nomura,et al.  Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69°S, 39°E), Antarctica , 2002 .

[7]  Wind-bias correction method for narrowband sodium Doppler lidars using iodine absorption spectroscopy. , 2009, Applied optics.

[8]  Jeffrey P. Thayer,et al.  A high‐latitude observation of sporadic sodium and sporadic E‐layer formation , 1998 .

[9]  H. Fujiwara,et al.  Variations of the neutral temperature and sodium density between 80 and 107 km above Tromsø during the winter of 2010–2011 by a new solid‐state sodium lidar , 2014 .

[10]  Yutaka Hayano,et al.  Sodium D2 resonance radiation in single-pass sum-frequency generation with actively mode-locked Nd:YAG lasers. , 2007, Optics letters.

[11]  F. Lübken,et al.  Potassium lidar temperatures and densities in the mesopause region at Spitsbergen (78°N) , 2007 .

[12]  H. Schmidt,et al.  Long-term variability in mesopause region temperatures over Fort Collins, Colorado (41°N, 105°W) based on lidar observations from 1990 through 2007 , 2009 .

[13]  S. Wada,et al.  A sporadic sodium layer event detected with five‐directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway , 2015 .

[14]  T. Yuan,et al.  Retrieving mesopause temperature and line-of-sight wind from full-diurnal-cycle Na lidar observations. , 2015, Applied optics.

[15]  J. D. Vance,et al.  Continuous-wave sodium D2 resonance radiation generated in single-pass sum-frequency generation with periodically poled lithium niobate. , 2009, Optics letters.

[16]  C. Gardner,et al.  Observed temperature structure of the atmosphere above Syowa Station, Antarctica (69°S, 39°E) , 2004 .

[17]  P. Batista,et al.  Sodium lidar measurements of mesopause region temperatures at 23° S , 2011 .

[18]  S. Wada,et al.  Decrease in sodium density observed during auroral particle precipitation over Tromsø, Norway , 2013 .

[19]  C. Tepley,et al.  Potassium Doppler-resonance lidar for the study of the mesosphere and lower thermosphere at the Arecibo Observatory , 2003 .

[20]  J. D. Vance,et al.  A proposed all-solid-state transportable narrow-band sodium lidar for mesopause region temperature and horizontal wind measurements , 2007 .

[21]  S. Wada,et al.  Fine structure of sporadic sodium layer observed with a sodium lidar at Tromsø, Norway , 2011 .

[22]  Wei Liu,et al.  Narrowband sodium lidar for the measurements of mesopause region temperature and wind. , 2012, Applied optics.