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Articles 31 - 42 of 42
Full-Text Articles in Climate
Kz Spatial Wave Separation With Applications To Atmospheric Data, Ming Luo
Kz Spatial Wave Separation With Applications To Atmospheric Data, Ming Luo
Legacy Theses & Dissertations (2009 - 2024)
Unlike one-dimensional wave reconstruction, reconstruction 2D spatial wave via Fourier Transform doesn’t look like a non-parametric algorithm. In other words, we need the wave frequency and wave direction information to recover the spatial wave via Fourier Transform, especially when the stress of noise is present. The direct consequence is that accurate estimations of wave parameters are need for reconstructing of spatial waves. To this end, we propose to improve the accuracy of motion image scale detection and parameter estimations with optimization based on Kolmogorov-Zurbenko periodogram (KZP) information. Related methods and algorithms are denoted under the name of Kolmogorov-Zurbenko wave separations. …
Understanding Predictive Skill Of Arctic Sea Ice And Its Linkage With Mid-Latitude Weather And Climate In The Ncep Climate Forecast System, Colleen Mchugh
Understanding Predictive Skill Of Arctic Sea Ice And Its Linkage With Mid-Latitude Weather And Climate In The Ncep Climate Forecast System, Colleen Mchugh
Legacy Theses & Dissertations (2009 - 2024)
Arctic climate is undergoing significant change, particularly rapid decline of sea ice. Arctic sea ice plays an important role in local, regional, and global climate through a variety of physical processes as seen in observational analysis as well as modeling studies. Recent research suggested that decreasing autumn and winter Arctic sea ice extent (SIE) has been shown to have an effect on mid-latitude weather patterns during the winter months. Therefore, accurate forecasts of Arctic sea ice extent and the associated teleconnections with the mid-latitudes are important for accurate seasonal climate prediction. The NCEP Climate Forecast System version 2 (CFSv2) is …
Climate Change, Spruce Root Phenology, And Allocation Of Carbon Below- And Above-Ground, Marie Louise Orton
Climate Change, Spruce Root Phenology, And Allocation Of Carbon Below- And Above-Ground, Marie Louise Orton
Legacy Theses & Dissertations (2009 - 2024)
Tree ring analysis has relied on a close relationship between climate and photosynthetically-derived stem enlargement. Lengthening growing seasons associated with climate warming have been predicted to enhance carbon sequestration as wood in trees, but this
Understanding The Dependence Of Radiative Feedbacks And Clouds On The Spatial Structure Of Ocean Heat Uptake, Lance Rayborn
Understanding The Dependence Of Radiative Feedbacks And Clouds On The Spatial Structure Of Ocean Heat Uptake, Lance Rayborn
Legacy Theses & Dissertations (2009 - 2024)
Ocean heat uptake and radiative forcing are important for understanding transient climate change. Differences in efficacy of ocean heat uptake (suppression of surface warming per unit energy flux into the deep oceans relative to CO2 forcing) account for a substantial fraction of the spread in transient warming between models. Rose et al. (2014) studied the dependence of efficacy on the spatial pattern of ocean heat uptake in an ensemble of aquaplanet simulations with prescribed ocean heat uptake, and found large differences in model responses to high versus low latitude uptake. This study accurately quantifies these model responses through the use …
Old Tools, New View : Utilizing Species Distribution Models To Focus Conservation Efforts Under A Changing Climate, Samantha Hoff
Old Tools, New View : Utilizing Species Distribution Models To Focus Conservation Efforts Under A Changing Climate, Samantha Hoff
Legacy Theses & Dissertations (2009 - 2024)
In New York State, scientists have observed many changes in bird communities including population declines, range contractions, mismatch between behavior and resources, and changes in bird phenology as a result of climatic changes. Four objectives were addressed with this research: understanding how different bird species may respond to changing climatic conditions under a future IPCC emission scenario; determining how suitable habitat may change in the future and what bioclimatic variables are important to specific avian guilds; identifying hotspots of suitable habitat that may represent important areas for conservation investment; and investigating how managers can incorporate future climate predictions into management …
The Association Of Summer Temperatures With Hospital Admissions For Renal Diseases In New York State : A Case-Crossover Study, Barbara A. Fletcher
The Association Of Summer Temperatures With Hospital Admissions For Renal Diseases In New York State : A Case-Crossover Study, Barbara A. Fletcher
Legacy Theses & Dissertations (2009 - 2024)
This study assessed the association between high temperatures and increased odds of hospitalization for renal diseases which, to date, has been examined in only a small number of studies. A case-crossover design was used to study 147,885 hospital admissions with renal diagnoses during July and August, 1991-2004 in New York State. Regional temperature, humidity and barometric pressure data from automated monitors were used as exposure indicators. Using time-stratified referent selection and conditional logistic regression analysis, an overall 9% increase in odds of hospitalization for acute renal failure per 5°F (2.78°C) was found for mean temperature at a one day lag …
Assessing The Reproducibility Of Coral Oxygen And Carbon Isotope Time Series From Fiji And Tonga And Their Application To The Reconstruction Of South Pacific Convergence Zone Movements Since The Mid-1800s, Emilie Pauline Dassie
Assessing The Reproducibility Of Coral Oxygen And Carbon Isotope Time Series From Fiji And Tonga And Their Application To The Reconstruction Of South Pacific Convergence Zone Movements Since The Mid-1800s, Emilie Pauline Dassie
Legacy Theses & Dissertations (2009 - 2024)
A major feature affecting the hydrology of the southern hemisphere is the South Pacific Convergence Zone (SPCZ); a band of high rainfall extending southeastward from the Western Pacific Warm Pool (WPWP). It is a key source of atmospheric water vapor and latent heating. While it is clear that the SPCZ plays a fundamental role in Earth's climate, little is known about the patterns and mechanisms responsible for interannual to century-scale changes in its position and how it may respond to global climate change.
Review Of The Simulation Of The Precis Regional Climate Model Over Tropical South America Using Gcm And Reanalysis Lateral Boundary Conditions, Dana Mcglone
Legacy Theses & Dissertations (2009 - 2024)
High-resolution regional climate models (RCM) run over a limited domain are increasingly used to simulate seasonal to interannual climate variability over South America and to assess the spatiotemporal impact of future climate change under a variety of emission scenarios. Global climate models (GCM) are often too coarse to resolve local circulations and the topography of the Andes, leading to problems with simulation of temperature and precipitation patterns throughout the domain. A RCM model can also better represent the climate at a regional scale; however, they are subject to errors introduced by the driving global models. For this study, the Hadley …
Biogeographic Consequences Of Historic And Contemporary Climate Change In Boreal Forest Birds, Joel Ralston
Biogeographic Consequences Of Historic And Contemporary Climate Change In Boreal Forest Birds, Joel Ralston
Legacy Theses & Dissertations (2009 - 2024)
In this dissertation, I combine ecological niche models (ENMs), which can be extrapolated through time to predict historic and future changes in species distributions, with mitochondrial and nuclear genetic markers to study the biogeographic consequences of historic and contemporary climate change on boreal forest birds, and in particular Blackpoll Warbler.
Western Equatorial Pacific Climate Variability From Restricted Basins : Century Scale Changes In Kau Bay To Glacial-Interglacial Changes In The Sulu Sea, Samantha Langton
Western Equatorial Pacific Climate Variability From Restricted Basins : Century Scale Changes In Kau Bay To Glacial-Interglacial Changes In The Sulu Sea, Samantha Langton
Legacy Theses & Dissertations (2009 - 2024)
The surface ocean in the western equatorial Pacific contains some of the warmest water on the planet in the western Pacific warm pool (WPWP). Changes in the size and scope of the warm pool have a significant impact on global climate. With the concern of changes in the extent of this body of water as a result of anthropomorphic changes in atmospheric composition, it is vital to investigate prior changes to the WPWP, the causes of such changes, and resultant effects. For my dissertation, I used several proxies to analyze sediments from Kau Bay and the Sulu Sea in Indonesia …
A Spline Kernel Based Smoothing Algorithm : A Comparison Of Methods With A Spatiotemporal Application To Global Climate Fluctuations, Derek Daniel Cyr
A Spline Kernel Based Smoothing Algorithm : A Comparison Of Methods With A Spatiotemporal Application To Global Climate Fluctuations, Derek Daniel Cyr
Legacy Theses & Dissertations (2009 - 2024)
In statistics, smoothing is a technique that attempts to capture the key patterns or trends in data while leaving out the noise that is obscuring them. Nonparametric techniques are well-suited for smoothing as they do not rely on assumptions that the data arise from a given probability distribution.
Assessing Replicated Coral Trace Element (Sr/Ca And Mg/Ca) Variability And Skeletal Growth Records From The Tropical Pacific, Henry Chun-Yi Wu
Assessing Replicated Coral Trace Element (Sr/Ca And Mg/Ca) Variability And Skeletal Growth Records From The Tropical Pacific, Henry Chun-Yi Wu
Legacy Theses & Dissertations (2009 - 2024)
To gain a more complete history and understanding of the full amplitude of climate variability prior to instrumental records, science must rely on natural proxy archives that are sensitive to fluctuations in key climate parameters. Calcium carbonate skeletons of long-living hermatypic corals in some locations have been shown to be natural archives of surface ocean variability. This study investigated the fidelity and reproducibility of coral derived Sr/Ca time series from Clipperton Atoll, Fiji, and Tonga as accurate proxies of sea surface temperature (SST). The replicated high-resolution Sr/Ca time series record monthly and bimonthly SST changes, though with a greater magnitude …