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- Keyword
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- Castor Lake (1)
- Computer modeling (GEM-FLEXPART) (1)
- Diatoms (1)
- Diffusion (1)
- Drought (1)
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- Hydrologic variation (1)
- Multi-instrument calibration (1)
- Ozone (1)
- Ozone transport (1)
- Ozonesonde (1)
- Pacific Decadal Oscillation (1)
- Radar (1)
- Raman-scatter lidar (1)
- Salinity (1)
- Stratosphere-troposphere exchange (1)
- Stratospheric ozone intrusion (1)
- Tropopause (1)
- Turbulence characteristics; GPS dropwindsonde; Hurricane boundary layer; Direct observation; Numerical simulation; Turbulence model (1)
- UTLS water vapour (1)
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Multi-Sensor Calibration And Validation Of The Uwo-Pcl Water Vapour Lidar, Robin Wing
Multi-Sensor Calibration And Validation Of The Uwo-Pcl Water Vapour Lidar, Robin Wing
Electronic Thesis and Dissertation Repository
The Purple Crow Lidar (PCL) has recently participated in a water vapour validation cam- paign with the NASA/GSFC Atmospheric Laboratory for Validation/Interagency Collaboration and Education (ALVICE) Lidar. The purpose of this calibration campaign is to insure that PCL water vapour measurements are of sufficient quality for use in scientific investigations of atmo- spheric change, and to be included in the Network for the Detection of Atmospheric Climate Change (NDACC) data base. The detection of long term changes in water vapour concentra- tion, particularly in the upper troposphere and lower stratosphere (UTLS) is an issue of pressing scientific, ecological and societal …
Diatoms In Castor Lake (North-Central Washington, Usa) – Proxies Of Climate And Hydrologic Variation, Kelly D. Hollingshead
Diatoms In Castor Lake (North-Central Washington, Usa) – Proxies Of Climate And Hydrologic Variation, Kelly D. Hollingshead
Electronic Thesis and Dissertation Repository
This research provides a high temporal resolution (1 sample / 2-3 years) record of hydrologic variation for the last 2,000 years using a lake sediment record from Castor Lake, a closed-basin system in Washington, USA. The core was dated using 137Cs, 14C, and tephrochronology. Approximately 600 diatoms were identified and enumerated in 198 samples from a Castor Lake freeze core and Livingstone-piston core. A diatom-inference model for salinity was applied to reconstruct fossil diatom salinity. Diatom-inferred salinity for the last century tracked Palmer Drought Severity Index, indicating diatom community composition tracks effective moisture and can be used to …
A Study On The Turbulent Characteristics Within The Hurricane Boundary Layer, Sunwei Li
A Study On The Turbulent Characteristics Within The Hurricane Boundary Layer, Sunwei Li
Electronic Thesis and Dissertation Repository
As the medium between the sea surface and the upper atmosphere in a hurricane, the Hurricane Boundary Layer (HBL) plays a key role in the overall dynamics of a tropical cyclone, and therefore turbulence exchanges within the HBL deserve a thorough investi- gation. However, since it is dangerous and difficult to take direct measurements within the HBL, studies of the HBL turbulence processes based on direct observations are rare. Thanks to the newly developed dropwindsonde equipped with a Global Position System (GPS) receiver, it is now possible to measure wind velocities and other meteorological variables with an unprecedented accuracy and …
Ozone Measurements And Transport, Mohammed Kedir Osman
Ozone Measurements And Transport, Mohammed Kedir Osman
Electronic Thesis and Dissertation Repository
Ozone intrusions from the stratosphere to the troposphere occur as part of the Brewer-Dobson circulation, but the details of the microphysics of the process are unresolved. This research mainly focuses on near-tropopause regions, and examines stratospheric ozone intrusions into the troposphere across this stable zone. My research objective is to identify the small-scale atmospheric dynamical features responsible for the intrusion of stratospheric ozone into the troposphere, and to determine their relative importance from case to case.
Windprofiler radars, together with frequent ozonesonde launches, have been used to detect stratospheric ozone intrusions. This work has been supplemented by numerical simulation via …