Temperature  and  water  vapour  measurements  in  the  framework  of  NDACC

Rosa, Benedetto De; Girolamo, Paolo Di; Summa, Donato

doi:10.5194/amt-2019-140

Cited by 1 publication

(1 citation statement)

References 32 publications

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“…The receiver is developed around a Newtonian telescope, with a primary mirror diameter of 0.45 m. The receiver also includes two small lenses, with a diameter of 0.05 m; which are used for the collection of the 532 and 1064 nm elastic signals. The key feature of BASIL is represented by its capability to perform daytime and nighttime high-resolution and accurate measurements of atmospheric temperature and water vapor based on the application of the rotational and vibrational Raman lidar technique, respectively (Di Girolamo et al 2004Girolamo et al , 2009aGirolamo et al , 2009bGirolamo et al , 2017De Rosa et al 2019), together with providing measurements of particle backscatter at 355, 532, and 1064 nm; particle extinction at 355 and 532 nm; and particle depolarization at 355 and 532 nm (Di Girolamo et al 2009b, 2012a, 2012b, Girolamo et al 2018b. The procedure applied to calibrate water vapor mixing ratio and temperature profile measurements by BASIL was carefully described in Di Girolamo et al (2009a).…”

Section: Water Vapor Lidarsmentioning

confidence: 99%

Water vapor mixing ratio and temperature inter-comparison results in the framework of the Hydrological Cycle in the Mediterranean Experiment—Special Observation Period 1

Girolamo

Rosa

Flamant

et al. 2020

Bull. of Atmos. Sci.& Technol.

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This paper reports results from an inter-comparison effort involving water vapor and temperature sensors, which took place in the NorthWestern Mediterranean in the period September-November 2012 in the framework of the first Special Observing Period of the Hydrological cycle in the Mediterranean Experiment. The involved sensors are the ground-based Raman lidars BASIL and WALI, the airborne water vapor differential absorption lidar LEANDRE 2, flying onboard the ATR42 aircraft, as well as additional water vapor and temperature sensors (radiosondes, aircraft in situ sensors, and a microwave radiometer). The main objective of the inter-comparison is the determination of the measurement uncertainty affecting these sensors. The effort benefitted from dedicated ATR42 flights in the framework of the EUropean Facility for Airborne Research (EUFAR) Project "WaLiTemp." Comparisons between BASIL and LEANDRE 2 in terms of water vapor mixing ratio indicate a vertically averaged mean bias, bias, and mean absolute bias, bias , between the two sensors of − 0.08 g kg −1 (or − 2.50%) and 0.67 g kg −1 (or 2.77%), respectively. For all sensors' pairs including LEANDRE 2, the inter-comparison range is 0.5-3 km, while for all other sensors' pairs, the inter-comparison range is 0.5-6 km. Comparisons between BASIL and the microwave radiometer indicate bias and bias values between the two sensors of − 0.02 g kg −1 (or − 1.11%) and 0.22 g kg −1 (or 7.31%), respectively, for water vapor mixing ratio measurements, and a value for both bias and bias of 0.62 K for temperature measurements. Comparisons of BASIL with the radiosondes indicate bias and bias values of 0.28 g kg −1 (or 1.56%) and 0.51 g kg −1 (or 6.66%), respectively, for water vapor mixing ratio measurements, and − 0.43 K and 0.77 K, respectively, for temperature measurements, while comparisons of BASIL with aircraft in situ sensors indicate bias and bias values of 0.22 g kg −1 (or 1.17%) and 0.43 g kg −1 (or 4.62%), respectively, for water vapor mixing ratio measurements, and 0.15 K and 0.47 K, respectively, for temperature measurements. Comparisons of LEANDRE 2 with the radiosondes result in bias and bias values of 0.21 g kg −1 (or 0.76%) and 1.10 g kg −1 (or 11.05%), respectively, while comparisons of LEANDRE 2 with the aircraft in situ sensors indicate a value of both bias and bias of 0.76 g kg −1 (or 8.9%). Comparisons of in situ sensors with the radiosondes reveal bias and bias values of 0.36 g kg −1 (or 2.26%) and 0.36 g kg −1 (or 4.72%),

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