TY - GEN
T1 - Variabilities of Evaporation Ducts in a Near-Shore Coastal Environment
AU - Alappattu, Denny P.
AU - Wang, Qing
AU - Ulate, Marcela
AU - Haack, Tracy
AU - Christman, Adam J.
AU - Fernando, Harindra Joseph S.
AU - Khelif, Djamal
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018
Y1 - 2018
N2 - This study characterizes the evaporation ducts observed offshore of Duck, North Carolina using measurements from the east coast field campaign, the Coupled Air Sea Processes and Electromagnetic ducting Research (CASPER-East), conducted from 10 October 2015 to 6 November 2015. Pressure, temperature, humidity, and wind speed and direction were collected by sensors on the bow mast of the CASPER research vessels R/V Hugh R. Sharp and R/V Atlantic Explorer. An Infrared SST Autonomous Radiometer was used to measure the sea surface skin temperature. The surface layer mean profiles of temperature and specific humidity were derived using the flux-profile relationships employed in the COARE bulk flux algorithm version 3.0 with inputs from bow mast measurements using 20-minute averaging. Significant cooling was observed between 17 October 2015 and 20 October 2015 caused by the strong northerly flow that brought cold and dry air to the experiment domain. Duct height and strength were generally higher during the cold and dry air advection events observed on 17, 24 and 25 October. In addition, a sharp increase in the duct height was identified associated with stable surface layer conditions on 14, 22, 26, and 30 Oct. Duct height varied from 0 m to 49.8 m and mean duct height was 10.4 m during the experiment.
AB - This study characterizes the evaporation ducts observed offshore of Duck, North Carolina using measurements from the east coast field campaign, the Coupled Air Sea Processes and Electromagnetic ducting Research (CASPER-East), conducted from 10 October 2015 to 6 November 2015. Pressure, temperature, humidity, and wind speed and direction were collected by sensors on the bow mast of the CASPER research vessels R/V Hugh R. Sharp and R/V Atlantic Explorer. An Infrared SST Autonomous Radiometer was used to measure the sea surface skin temperature. The surface layer mean profiles of temperature and specific humidity were derived using the flux-profile relationships employed in the COARE bulk flux algorithm version 3.0 with inputs from bow mast measurements using 20-minute averaging. Significant cooling was observed between 17 October 2015 and 20 October 2015 caused by the strong northerly flow that brought cold and dry air to the experiment domain. Duct height and strength were generally higher during the cold and dry air advection events observed on 17, 24 and 25 October. In addition, a sharp increase in the duct height was identified associated with stable surface layer conditions on 14, 22, 26, and 30 Oct. Duct height varied from 0 m to 49.8 m and mean duct height was 10.4 m during the experiment.
KW - air-sea interaction
KW - ducting
KW - environmental factors
KW - propagation measurements
KW - refractivity
KW - weather forecasting
UR - https://www.scopus.com/pages/publications/85061921731
U2 - 10.1109/APUSNCURSINRSM.2018.8608237
DO - 10.1109/APUSNCURSINRSM.2018.8608237
M3 - Conference contribution
AN - SCOPUS:85061921731
T3 - 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings
SP - 887
EP - 888
BT - 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018
Y2 - 8 July 2018 through 13 July 2018
ER -