Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Effects of solar activity on noise in CALIOP profiles above the South Atlantic Anomaly

Abstract : We show that nighttime dark noise measurements from the spaceborne lidar CALIOP contain valuable infor-mation about the evolution of upwelling high-energy ra-diation levels. Above the South Atlantic Anomaly (SAA), CALIOP dark noise levels fluctuate by ±6 % between 2006 and 2013, and follow the known anticorrelation of local par-ticle flux with the 11-year cycle of solar activity (with a 1-year lag). By analyzing the geographic distribution of noisy profiles, we are able to reproduce known findings about the SAA region. Over the considered period, it shifts westward by 0.3 • year −1 , and changes in size by 6 • meridionally and 2 • zonally, becoming larger with weaker solar activity. All results are in strong agreement with previous works. We pre-dict SAA noise levels will increase anew after 2014, and will affect future spaceborne lidar missions most near 2020.
Document type :
Journal articles
Complete list of metadata

Cited literature [13 references]  Display  Hide  Download

https://hal-polytechnique.archives-ouvertes.fr/hal-01083512
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Monday, November 17, 2014 - 1:48:59 PM
Last modification on : Thursday, March 17, 2022 - 10:08:17 AM
Long-term archiving on: : Friday, April 14, 2017 - 4:46:38 PM

File

amt-7-1597-2014.pdf
Publisher files allowed on an open archive

Identifiers

Citation

V. Noel, H. Chepfer, C. Hoareau, M. Reverdy, G. Cesana. Effects of solar activity on noise in CALIOP profiles above the South Atlantic Anomaly. Atmospheric Measurement Techniques, European Geosciences Union, 2014, 7, pp.1597-1603. ⟨10.5194/amt-7-1597-2014⟩. ⟨hal-01083512⟩

Share

Metrics

Record views

324

Files downloads

228