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Impact Of Southeast Asian Smoke On Aerosol Properties In Southwest China: First Comparison Of Model Simulations With Satellite And Ground Observations, Jun Zhu, Xiangao Xia, Jun Wang, Jinqiang Zhang, Christine Wiedinmyer, Jenny A. Fisher, Christoph A. Keller
Impact Of Southeast Asian Smoke On Aerosol Properties In Southwest China: First Comparison Of Model Simulations With Satellite And Ground Observations, Jun Zhu, Xiangao Xia, Jun Wang, Jinqiang Zhang, Christine Wiedinmyer, Jenny A. Fisher, Christoph A. Keller
Faculty of Science, Medicine and Health - Papers: part A
Smoke aerosols have been observed in Southwest China as a result of long-range transport from surrounding areas in March and April. The processes driving this transport and the resultant impact on regional aerosol optical properties are studied here through a combined use of the Goddard Earth Observing System (GEOS)-Chem chemistry transport model in conjunction with satellite and the first-ever ground-based observations in the Southwest China. The potential biomass burning source regions as well as their respective contributions to aerosol loading in Southwest China are quantified. Compared to Sun photometer observations of aerosol optical depth (AOD) at 550nm at eight stations …
Hox Measurements In The Summertime Upper Troposphere Over Europe: A Comparison Of Observations To A Box Model And A 3-D Model, E Regelin, H Harder, M Martinez, D Kubistin, C Tatum Ernest, H Bozem, T Klippel, Z Hosaynali-Beygi, H Fischer, R Sander, P Jockel, R Konigstedt, J Lelieveld
Hox Measurements In The Summertime Upper Troposphere Over Europe: A Comparison Of Observations To A Box Model And A 3-D Model, E Regelin, H Harder, M Martinez, D Kubistin, C Tatum Ernest, H Bozem, T Klippel, Z Hosaynali-Beygi, H Fischer, R Sander, P Jockel, R Konigstedt, J Lelieveld
Faculty of Science, Medicine and Health - Papers: part A
In situ airborne measurements of OH and HO2 with the HORUS (HydrOxyl Radical measurement Unit based on fluorescence Spectroscopy) instrument were performed in the summertime upper troposphere across Europe during the HOOVER 2 (HOx OVer EuRope) campaign in July 2007. Complementary measurements of trace gas species and photolysis frequencies were conducted to obtain a broad data set, which has been used to quantify the significant HOx sources and sinks. In this study we compare the in situ measurement of OH and HO2 with simulated mixing ratios from the constrained box model CAABA/MECCA (Chemistry As A Box Model Application/Module Efficiently Calculating …
The Use Of Remote Sensing To Scale Up Measures Of Carbonate Production On Reef Systems: A Comparison Of Hydrochemical And Census-Based Estimation Methods, Sarah Hamylton, Jacob Silverman, Emily Shaw
The Use Of Remote Sensing To Scale Up Measures Of Carbonate Production On Reef Systems: A Comparison Of Hydrochemical And Census-Based Estimation Methods, Sarah Hamylton, Jacob Silverman, Emily Shaw
Faculty of Science, Medicine and Health - Papers: part A
The present study uses remote-sensing imagery to estimate carbonate production of the complete One Tree Island reef system, Great Barrier Reef, using hydrochemical (alkalinity reduction) and census-based (budgetary) methods. For five sites representing different benthic cover types across the reef system, carbonate production is determined using hydrochemical techniques that incubate substrates in a local aquarium and measure total alkalinity, total ammonia nitrogen, and total oxidized nitrogen. Local estimates are scaled up to the reef-system scale using a WorldView-2 satellite image, which is ground truthed against a field data set of 350 spatially referenced records of benthic assemblage. Annual total reef …
Paleoclimate Data-Model Comparison And The Role Of Climate Forcings Over The Past 1500 Years, Steven J. Phipps, Helen V. Mcgregor, Joelle Gergis, Ailie J. E Gallant, Raphael Neukom, Samantha Stevenson, Duncan Ackerley, Josephine R. Brown, Matt J. Fischer, Tas D. Van Ommen
Paleoclimate Data-Model Comparison And The Role Of Climate Forcings Over The Past 1500 Years, Steven J. Phipps, Helen V. Mcgregor, Joelle Gergis, Ailie J. E Gallant, Raphael Neukom, Samantha Stevenson, Duncan Ackerley, Josephine R. Brown, Matt J. Fischer, Tas D. Van Ommen
Faculty of Science, Medicine and Health - Papers: part A
The past 1500 years provide a valuable opportunity to study the response of the climate system to external forcings. However, the integration of paleoclimate proxies with climate modeling is critical to improving the understanding of climate dynamics. In this paper, a climate system model and proxy records are therefore used to study the role of natural and anthropogenic forcings in driving the global climate. The inverse and forward approaches to paleoclimate data–model comparison are applied, and sources of uncertainty are identified and discussed. In the first of two case studies, the climate model simulations are compared with multiproxy temperature reconstructions. …
A Comparison Of The Impact Of 'Seagrass-Friendly' Boat Mooring Systems On Posidonia Australis, Marie-Claire A. Demers, Andrew R. Davis, Nathan A. Knott
A Comparison Of The Impact Of 'Seagrass-Friendly' Boat Mooring Systems On Posidonia Australis, Marie-Claire A. Demers, Andrew R. Davis, Nathan A. Knott
Faculty of Science, Medicine and Health - Papers: part A
Permanent boat moorings have contributed to the decline of seagrasses worldwide, prompting the development of ‘seagrass-friendly’ moorings. We contrasted seagrass cover and density (predominantly Posidonia australis) in the vicinity of three mooring types and nearby reference areas lacking moorings in Jervis Bay, Australia. We examined two types of ‘seagrass-friendly’ mooring and a conventional ‘swing’ mooring. ‘Swing’ moorings produced significant seagrass scour, denuding patches of ∼9 m radius. Seagrass-friendly ‘cyclone’ moorings produced extensive denuded patches (average radius of ∼18 m). Seagrass-friendly ‘screw’ moorings, conversely, had similar seagrass cover to nearby reference areas. Our findings reinforce previous work highlighting the negative effects …
Comparison Of Assessment Performance Of Rural And Regional Students In A Unique Australian Graduate-Entry Medical Program, David L. Garne, J Bushnell, A Lethbridge, J Douglas
Comparison Of Assessment Performance Of Rural And Regional Students In A Unique Australian Graduate-Entry Medical Program, David L. Garne, J Bushnell, A Lethbridge, J Douglas
Faculty of Science, Medicine and Health - Papers: part A
The Graduate School of Medicine at the University of Wollongong is one of Australia's newest medical schools, with a regional/rural focus and a distributed campus, and students are all expected to spend a significant proportion of their training in a rural setting. Due to the diverse learning environments that students are exposed to, we sought to determine by phase if there was any difference in examination results between groups who were located in rural settings and those in regional settings.
Sciamachy Wfm-Doas Xco2: Comparison With Carbontracker Xco2 Focusing On Aerosols And Thin Clouds, J Heymann, O Schneising, Markus Reuter, M Buchwitz, V V. Rozanov, Voltaire A. Velazco, H Bovensmann, J P. Burrows
Sciamachy Wfm-Doas Xco2: Comparison With Carbontracker Xco2 Focusing On Aerosols And Thin Clouds, J Heymann, O Schneising, Markus Reuter, M Buchwitz, V V. Rozanov, Voltaire A. Velazco, H Bovensmann, J P. Burrows
Faculty of Science, Medicine and Health - Papers: part A
Carbon dioxide (CO2) is the most important greenhouse gas whose atmospheric loading has been significantly increased by anthropogenic activity leading to global warming. Accurate measurements and models are needed in order to reliably predict our future climate. This, however, has challenging requirements. Errors in measurements and models need to be identified and minimised. In this context, we present a comparison between satellite-derived column-averaged dry air mole fractions of CO2, denoted XCO2, retrieved from SCIAMACHY/ENVISAT using the WFM-DOAS (weighting function modified differential optical absorption spectroscopy) algorithm, and output from NOAA's global CO2 modelling and assimilation system CarbonTracker. We investigate to what …
Determining Rotational Temperatures From The Oh(8-3) Band, And A Comparison With (Oh96-2) Rotational Temperatures At Davis, Antarctica, Frances Phillips, G B. Burns, W J R French, P F B Williams, A R. Klekociuk, R P. Lowe
Determining Rotational Temperatures From The Oh(8-3) Band, And A Comparison With (Oh96-2) Rotational Temperatures At Davis, Antarctica, Frances Phillips, G B. Burns, W J R French, P F B Williams, A R. Klekociuk, R P. Lowe
Faculty of Science, Medicine and Health - Papers: part A
Rotational temperatures derived from the OH(8–3) band may vary by ~18K depending on the choice of transition probabilities. This is of concern when absolute temperatures or trends determined in combination with measurements of other hydroxyl bands are important. In this paper, measurements of the OH(8–3) temperature-insensitive Q/P and R/P line intensity ratios are used to select the most appropriate transition probabilities for use with this band. Aurora, airglow and solar and telluric absorption in the OH(8–3) band are also investigated. Water vapour absorption of P1(4), airglow or auroral contamination of P1(2) and solar absorption in the …
Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson
Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson
Faculty of Science, Medicine and Health - Papers: part A
We present observations of the hydroxyl (6–2) airglow lines from ~ 87 km altitude obtained at Davis station, Antarctica, in the austral winter of 1999. Nine nights of observations were made of the P-branch near λ840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q1(1) doublet at λ834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q1(1) spectra. Absolute temperatures determined by these methods are uncertain by ~ 2 and ~ 20 …