Predictability Of Biomass Burning In Response To Climate Changes,
2012
University of Bristol
Predictability Of Biomass Burning In Response To Climate Changes, A.-L. Daniau, Megan Walsh
All Faculty Scholarship for the College of the Sciences
Climate is an important control on biomass burning, but the sensitivity of fire to changes in temperature and moisture balance has not been quantified. We analyze sedimentary charcoal records to show that the changes in fire regime over the past 21,000 yrs are predictable from changes in regional climates. Analyses of paleo- fire data show that fire increases monotonically with changes in temperature and peaks at intermediate moisture levels, and that temperature is quantitatively the most important driver of changes in biomass burning over the past 21,000 yrs. Given that a similar relationship between climate drivers and fire emerges from …
Campaign Logistics, Mapping, And Discussion (Climate),
2012
Valparaiso University
Campaign Logistics, Mapping, And Discussion (Climate), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Campaign Logistics, Mapping, And Discussion (Djf),
2012
Valparaiso University
Campaign Logistics, Mapping, And Discussion (Djf), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Campaign Logistics, Mapping, And Discussion (Jja),
2012
Valparaiso University
Campaign Logistics, Mapping, And Discussion (Jja), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Summary And Discussion Of Science Questions (Climate),
2012
Valparaiso University
Summary And Discussion Of Science Questions (Climate), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Summary And Discussion Of Science Questions (Djf),
2012
Valparaiso University
Summary And Discussion Of Science Questions (Djf), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Summary And Discussion Of Science Questions (Jja),
2012
Valparaiso University
Summary And Discussion Of Science Questions (Jja), Student Group
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Identification Of Ttl Boundaries Using The Ozone-Water Vapor Relationship,
2012
National Center for Atmospheric Research (NCAR)
Identification Of Ttl Boundaries Using The Ozone-Water Vapor Relationship, Laura Pan
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Two sets of TTL boundary definitions have been proposed in the literature. One uses the static stability structure (Gettelman and Foster, 2002) and the other uses the radiative forcing mass flux criterion (Fu et al., 2007; Fueglistaler et al., 2009). In this work, we present a method to characterize the TTL boundaries using ozone–water vapor relationship. The result shows that the tracer behavior supports the level of the minimum stability to be the lower boundary of the transition layer and the cold point to be a good proxy of the upper boundary. Using this method, we characterize and compare the …
Ozone Variations Over The Northern Subtropical Region Revealed By Ozonesonde Observations In Hanoi,
2012
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Ozone Variations Over The Northern Subtropical Region Revealed By Ozonesonde Observations In Hanoi, Shin-Ya Ogino
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Seasonal and subseasonal variations in the ozone mixing ratio (OMR) are investigated by using continuous seven-year ozonesonde data from Hanoi (21 0 N, 106 0 E), Vietnam. The mean seasonal variations for the seven years show large amplitude at the upper troposphere and lower stratosphere (UTLS) region (10–18 km) and at the lower troposphere (around 3 km) with standard deviations relative to the mean value of about 30% for both regions. In the UTLS region, the seasonal variation in the OMR shows a minimum in winter and a maximum in spring to summer. The variation seems to be caused by …
The Noaa H2o And O3 Data Base,
2012
National Oceanic and Atmospheric Administration (NOAA)
The Noaa H2o And O3 Data Base, Karen Rosenlof
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
In-Situ Water Vapor And Ozone Measurements In Lhasa And Kunming During The Asian Summer Monsoon,
2012
Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP-CAS)
In-Situ Water Vapor And Ozone Measurements In Lhasa And Kunming During The Asian Summer Monsoon, Jianchun Bian, Laura L. Pan, Laura Paulik, Holger Vömel, Hongbin Chen, Daren Lu
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Asian summer monsoon (ASM) anticyclone circulation is recognized to be a significant transport pathway for water vapor and pollutants to enter the stratosphere. Observational evidence, however, is largely based on satellite retrievals. We report the first coincident in situ measurements of water vapor and ozone within the ASM anticyclone. The combined water vapor and ozone sondes were launched from Kunming in August 2009 and Lhasa in August 2010. We present the key characteristics of these measurements, and provide a comparison to similar measurements from Alajuela, Costa Rica, an equatorial location, during the Tropical Composition, Cloud and Climate Coupling (TC4) campaign …
Development Of New Hydorometer Video Sonde (Hyvis) System For Ice Cloud Observation In Ttl Region,
2012
Meisei Electric Co., Ltd.
Development Of New Hydorometer Video Sonde (Hyvis) System For Ice Cloud Observation In Ttl Region, Kensaku Shimizu
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Cirrus clouds in the TTL play an important role on the radiation budget and thus the understanding of their optical properties together with the microphysical processes associated with their formation is quite important. In spite of the progress in theoretical research on the TTL cirrus (e.g., Koop et al., 2000; Peter et al., 2006), observational research is not enough because of the difficulty due to its height and coldness. On the other hand, research of cirrus clouds at 10 km height has been carried out since 1990s using aircraft and hydrometer sondes such as HYVIS (Murakami and Orikasa, 1997) and …
Impact Of Abrupt Stratospheric Dynamical Change On Tropical Tropopause Layer,
2012
Kyushu University
Impact Of Abrupt Stratospheric Dynamical Change On Tropical Tropopause Layer, Nawo Eguchi, Kunihiko Kodera, Tomoe Nasuno
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
We have studied the impact of stratospheric circulation change on water vapor in the Tropical Tropopause Layer (TTL) during the stratospheric sudden warming (SSW) events (e.g., Eguchi and Kodera, 2010). Increased Brewer-Dobson circulation associated with SSW produces cooling in the tropical lower stratosphere (LS). The cooling generally produces more cirrus clouds and decreases of the water vapor mixing ratio (WV) in the TTL, except for some regions over Africa and South American continents where penetrating clouds are expected. This time, we found a new stratospheric phenomenon which produces abrupt warming in the tropical stratosphere converse to the SSW event. The …
Volatility And Composition Of Ttl Aerosols By Balloon-Borne In-Situ Observation,
2012
Fukuoka University
Volatility And Composition Of Ttl Aerosols By Balloon-Borne In-Situ Observation, Masahiko Hayashi
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Tandem optical particle counters (OPC) were launched by balloon, from Biak 1 0 S, 136 0 E in January 2011 and 2012. One of the tandem OPC directly observed size distribution of aerosols of 0.3 – 7 µm in diameter, and another one observed size distributions in heated conditions of 100 0 , 150 0 , and 200 0 C through thermodenuder, to observe volatility of TTL aerosols. Most of TTL aerosol smaller than 0.8 µm in diameter show high volatility, suggesting to be composed of sulfuric acid or sulfate. There also exist non-volatile particles larger than 0.8 µm in …
Cloud-Top Height Dataset By Geostationary Satellite Split Window Measurements Trained With Cloudsat Data,
2012
Kyoto University
Cloud-Top Height Dataset By Geostationary Satellite Split Window Measurements Trained With Cloudsat Data, Noriyuki Nishi
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Lookup tables for estimating the cloud-top height (CTOP) and visible optical thickness of uppertropospheric clouds by the infrared brightness temperature (TB) at 10.8 μm (T11) and its difference from TB at 12 μm (DT11-12) measured by geostationary satellites are developed (Hamada and Nishi 2010, JAMC). These lookup tables were constructed by regressing the cloud radar measurements by the CloudSat satellite over the infrared measurements by the Japanese geostationary multifunctional transport satellite MTSAT-1R and MTSAT-2. The CTOP is available at http://database.rish.kyoto-u.ac.jp/arch/ctop/ since July 2005. The data have good precision for cirrus clouds (τ > ~3) that have large DT11-12 values and are …
Quantifying The Deep Convective Temperature Signal Within The Tropical Tropopause Layer (Ttl),
2012
Colorado State University - Fort Collins
Quantifying The Deep Convective Temperature Signal Within The Tropical Tropopause Layer (Ttl), Thomas Birner
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
Dynamics on a vast range of spatial and temporal scales, from individual convective plumes to planetary-scale circulations, play a role in driving the temperature variability in the tropical tropopause layer (TTL). Here, we aim to better quantify the deep convective temperature signal within the TTL using multiple datasets. First, we investigate the link between ozone and temperature in the TTL using the Southern Hemisphere Additional Ozonesondes (SHADOZ) dataset. Low ozone concentrations in the TTL are indicative of deep convective transport from the boundary layer. We confirm the usefulness of ozone as an indicator of deep convection by identifying a typical …
Tornado Warnings In Three Southern States: A Qualitative Analysis Of Public Response Patterns,
2012
The University of Texas Rio Grande Valley
Tornado Warnings In Three Southern States: A Qualitative Analysis Of Public Response Patterns, William Donner, Havidan Rodriguez, Walter Diaz
Sociology Faculty Publications
Recent research in three Southern states supplied data describing the role community structure and culture played in shaping public response to tornado risks. The following study identifies and describes how residents received, made sense of, and ultimately used information to make decisions about responding to warnings. In addition to a range of theoretical concerns, research was also intended to develop a set of safety policies derived from what the data reveals about the social psychology of risk perception, economic constraints to shelter, and the cultural aspects of response.Data analysis reveals a diverse set of social factors governing community response to …
Future Project Foci: Aeroclim,
2012
Alfred Wegener Institute for Polar and Marine Research (AWI)
Future Project Foci: Aeroclim, Markus Rex
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Future Project Foci: Contrast,
2012
National Center for Atmospheric Research (NCAR)
Future Project Foci: Contrast, Laura Pan
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
Future Project Foci: Cast-Sonde,
2012
University of Manchester
Future Project Foci: Cast-Sonde, Geraint Vaughan
U.S. - Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs
No abstract provided.
