Ocean subsurface studies with the CALIPSO spaceborne lidar

Lu, Xiaomei; Hu, Yongxiang; Trepte, Charles R.; Zeng, S.; Churnside, James H.

doi:10.1002/2014jc009970

Cited by 92 publications

(76 citation statements)

References 32 publications

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“…Behrenfeld et al (2013) used CALIOP measurements to quantify global ocean phytoplankton biomass and total particulate organic carbon stocks. Lu et al (2014) found significant relationships between integrated subsurface backscatter and chlorophyll-a concentration, as well as particulate organic carbon, which indicate a potential use of the CALIPSO lidar to estimate global chlorophyll-a and particulate organic carbon concentrations. Lu et al (2016) introduced an approach to estimate the ocean subsurface layer-integrated backscatter and particulate backscattering coefficient from CALIOP 30 • off-nadir lidar measurements.…”

Section: Spaceborne Lidarmentioning

confidence: 84%

Concept Design of the “Guanlan” Science Mission: China’s Novel Contribution to Space Oceanography

et al. 2019

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Among the various challenges that spaceborne radar observations of the ocean face, the following two issues are probably of a higher priority: inadequate dynamic resolution, and ineffective vertical penetration. It is therefore the vision of the National Laboratory for Marine Science and Technology of China that two highly anticipated breakthroughs in the coming decade are likely to be associated with radar interferometry and ocean lidar (OL) technology, which are expected to make a substantial contribution to a submesoscale-resolving and depth-resolving observation of the ocean. As an expanded follow-up of SWOT and an oceanic counterpart of CALIPSO, the planned "Guanlan" science mission comprises a dual-frequency (Ku and Ka) interferometric altimetry (IA), and a near-nadir pointing OL. Such an unprecedented combination of sensor systems has at least three prominent advantages. (i) The dual-frequency IA ensures a wider swath and a shorter repeat cycle which leads to a significantly improved temporal and spatial resolution up to days and kilometers. (ii) The first spaceborne active OL ensures a deeper penetration depth and an all-time detection which leads to a layered characterization of the optical properties of the subsurface ocean, while also serving as a near-nadir altimeter measuring vertical velocities associated with the divergence, and convergence of geostrophic eddy motions in the mixed layer. (iii) The simultaneous functioning of the IA/OL system allows for an enhanced correction of the contamination effects of the atmosphere and the air-sea interface, which in turn considerably reduces the error budgets of the two sensors. As a result, the integrated IA/OL payload is expected to resolve the ocean variability at submeso and sub-week scales with a centimeter-level accuracy, while also partially revealing marine life systems and ecosystems with a 10-m vertical interval in the euphotic layer, moving a significant step forward toward a "transparent ocean" down to the vicinity of the thermocline, both dynamically and bio-optically.

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Section: Spaceborne Lidarmentioning

confidence: 84%

Concept Design of the “Guanlan” Science Mission: China’s Novel Contribution to Space Oceanography

et al. 2019

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“…Preliminary investigations have demonstrated that data from an existing aerosol lidar on the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite can detect sub-surface oceanic scattering [49][50][51]. This system, designed for atmospheric measurements, does not have sufficient range resolution for detailed profiles of oceanic backscatter, but airborne measurements have demonstrated that a future orbiting lidar designed for both atmospheric and oceanic profiling could provide valuable information.…”

Section: Discussionmentioning

confidence: 99%

Optical Backscattering Measured by Airborne Lidar and Underwater Glider

et al. 2017

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Abstract:The optical backscattering from particles in the ocean is an important quantity that has been measured by remote sensing techniques and in situ instruments. In this paper, we compare estimates of this quantity from airborne lidar with those from an in situ instrument on an underwater glider. Both of these technologies allow much denser sampling of backscatter profiles than traditional ship surveys. We found a moderate correlation (R = 0.28, p < 10 −5 ), with differences that are partially explained by spatial and temporal sampling mismatches, variability in particle composition, and lidar retrieval errors. The data suggest that there are two different regimes with different scattering properties. For backscattering coefficients below about 0.001 m −1 , the lidar values were generally greater than the glider values. For larger values, the lidar was generally lower than the glider. Overall, the results are promising and suggest that airborne lidar and gliders provide comparable and complementary information on optical particulate backscattering.

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“…With that goal in mind, a monthly global dataset of daytime and nighttime aerosol extinction profile is available and known as Level3 aerosol product (Winker et al, 2013). Various research fields such as monitoring of stratospheric aerosol and aerosol distribution (Thomason et al, 2007), estimating the ocean subsurface (Lu et al, 2014), documenting shallow subsurface oil (Leifer et al, 2012), global distributing of the clear-sky occurrence rate during the daytime (Eguchi and Yokota, 2008), and dust detection (Luo et al, 2015;Brakhasi et al, 2018) have been studied using CALIPSO LIDAR observations. The various products of CALIOP and their corresponding product level are given in table 2.…”

Section: Calipso Satellitementioning

confidence: 99%

History and Applications of Space-Borne Lidars

Fouladinejad¹,

Matkan²,

Hajeb³

et al. 2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. LIDAR (Light Detection and Ranging) is a laser altimeter system that determines the distance by measuring pulse travel time. The data from the LIDAR systems provide unique information on the vertical structure of land covers. Compared to ground-based and airborne LIDARs providing a high-resolution digital surface model, space-borne LIDARs can provide important information about the vertical profile of the atmosphere in a global scale. The overall objective of these satellites is to study the elevation changes and the vertical distribution of clouds and aerosols. In this paper an overview on the space-borne laser scanner satellites are accomplished and their applications are introduced. The first space-borne LIDAR is the ICESat (Ice, Cloud and land Elevation Satellite) satellite carrying the GLAS instrument which was launched in January 2003. The CALIPSO (the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations, 2006), CATS-ISS (the Cloud-Aerosol Transport System, 2015), ADM-Aeolus (Atmospheric Dynamics Mission, 2018), and ICESat-2 (Ice, Cloud and land Elevation Satellite-2, 2018) satellites were respectively lunched and began to receive information about the vertical structure of the atmosphere and land cover. In addition, two ACE (The Aerosol-Cloud-Ecosystems, 2022) and EarthCARE (Earth Clouds, Aerosols and Radiation Explorer, 2021) space-borne satellites were planned for future. The data of the satellites are increasingly utilized to improve the numerical weather predictions (NWP) and climate modeling.

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Ocean subsurface studies with the CALIPSO spaceborne lidar

Cited by 92 publications

References 32 publications

Concept Design of the “Guanlan” Science Mission: China’s Novel Contribution to Space Oceanography

Concept Design of the “Guanlan” Science Mission: China’s Novel Contribution to Space Oceanography

Optical Backscattering Measured by Airborne Lidar and Underwater Glider

History and Applications of Space-Borne Lidars

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