341 research outputs found
Down By The Old Garden Gate
https://digitalcommons.library.umaine.edu/mmb-vp/1339/thumbnail.jp
Some considerations on coastal processes relevant to sea level rise
The effects of potential sea level rise on the shoreline and shore environment
have been briefly examined by considering the interactions between sea level rise and
relevant coastal processes. These interactions have been reviewed beginning with a
discussion of the need to reanalyze previous estimates of eustatic sea level rise and
compaction effects in water level measurement. This is followed by considerations on
sea level effects on coastal and estuarine tidal ranges, storm surge and water level
response, and interaction with natural and constructed shoreline features. The
desirability to reevaluate the well known Bruun Rule for estimating shoreline recession
has been noted. The mechanics of ground and surface water intrusion with reference to
sea level rise are then reviewed. This is followed by sedimentary processes in the
estuaries including wetland response. Finally comments are included on some probable
effects of sea level rise on coastal ecosystems.
These interactions are complex and lead to shoreline evolution (under a sea level
rise) which is highly site-specific. Models which determine shoreline change on the
basis of inundation of terrestrial topography without considering relevant coastal
processes are likely to lead to erroneous shoreline scenarios, particularly where the
shoreline is composed of erodible sedimentary material.
With some exceptions, present day knowledge of shoreline response to hydrodynamic
forcing is inadequate for long-term quantitative predictions. A series of interrelated
basic and applied research issues must be addressed in the coming decades to
determine shoreline response to sea level change with an acceptable degree of
confidence. (PDF contains 189 pages.
When Coulds Have Vanished And Skies Are Blue
https://digitalcommons.library.umaine.edu/mmb-vp/4943/thumbnail.jp
Results from Assimilating AMSR-E Soil Moisture Estimates into a Land Surface Model Using an Ensemble Kalman Filter in the Land Information System
Improve simulations of soil moisture/temperature, and consequently boundary layer states and processes, by assimilating AMSR-E soil moisture estimates into a coupled land surface-mesoscale model Provide a new land surface model as an option in the Land Information System (LIS
Representative Moakley with Representatives Bill Clay and Parren Mitchell, audio recording, 1974
This recording includes five interviews with members of Congress that were broadcast on WILD as episodes of a radio show featuring Congressman John Joseph Moakley. In the first segment Representative Joe Moakley discusses the Anti-Poverty Agency and the Office of Economic Opportunity. The second interview he focuses on Summer Neighborhood Youth Corp. The third segment includes a discussion with Representative Parren Mitchell about housing legislation. In the fourth interview Congressman Moakley speaks about the Older Americans Act and the Elderly Program. The last segment includes a discussion with Representative Bill Clay and focuses on the Corporation for Public Broadcasting and public television.https://dc.suffolk.edu/moakley-av/1018/thumbnail.jp
Assimilation of SMOS Retrievals in the Land Information System
The Soil Moisture and Ocean Salinity (SMOS) satellite provides retrievals of soil moisture in the upper 5 cm with a 30-50 km resolution and a mission accuracy requirement of 0.04 cm(sub 3 cm(sub -3). These observations can be used to improve land surface model soil moisture states through data assimilation. In this paper, SMOS soil moisture retrievals are assimilated into the Noah land surface model via an Ensemble Kalman Filter within the NASA Land Information System. Bias correction is implemented using Cumulative Distribution Function (CDF) matching, with points aggregated by either land cover or soil type to reduce sampling error in generating the CDFs. An experiment was run for the warm season of 2011 to test SMOS data assimilation and to compare assimilation methods. Verification of soil moisture analyses in the 0-10 cm upper layer and root zone (0-1 m) was conducted using in situ measurements from several observing networks in the central and southeastern United States. This experiment showed that SMOS data assimilation significantly increased the anomaly correlation of Noah soil moisture with station measurements from 0.45 to 0.57 in the 0-10 cm layer. Time series at specific stations demonstrate the ability of SMOS DA to increase the dynamic range of soil moisture in a manner consistent with station measurements. Among the bias correction methods, the correction based on soil type performed best at bias reduction but also reduced correlations. The vegetation-based correction did not produce any significant differences compared to using a simple uniform correction curve
Only a faded rosebud
Gift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]Listen, I'll tell you a story [first line]Only a faded rosebud [first line of chorus]B flat [key]Moderato [tempo]Popular song [form/genre]Decorative ; Dorothy Noble (photograph) [illustration]Publisher's advertisement on inside front and back cover [note
Critical phenomena: 150 years since Cagniard de la Tour
Critical phenomena were discovered by Cagniard de la Tour in 1822, who died
150 years ago. In order to mark this anniversary, the context and the early
history of his discovery is reviewed. We then follow with a brief sketch of the
history of critical phenomena, indicating the main lines of development until
the present date.
Os fen\'omenos cr\'{\i}ticos foram descobertos pelo Cagniard de la Tour em
Paris em 1822. Para comemorar os 150 anos da sua morte, o contexto e a
hist\'oria initial da sua descoberta \'e contada. Conseguimos com uma
descri\c{c}\~ao breve da hist\'oria dos fen\'emenos cr\'{\i}ticos, indicando as
linhas principais do desenvolvimento at\'e o presente.Comment: Latex2e, 8 pp, 3 eps figures include
Structure and activity of DmmA, a marine haloalkane dehalogenase
DmmA is a haloalkane dehalogenase (HLD) identified and characterized from the metagenomic DNA of a marine microbial consortium. Dehalogenase activity was detected with 1,3‐dibromopropane as substrate, with steady‐state kinetic parameters typical of HLDs ( K m = 0.24 ± 0.05 mM, k cat = 2.4 ± 0.1 s −1 ). The 2.2‐Å crystal structure of DmmA revealed a fold and active site similar to other HLDs, but with a substantially larger active site binding pocket, suggestive of an ability to act on bulky substrates. This enhanced cavity was shown to accept a range of linear and cyclic substrates, suggesting that DmmA will contribute to the expanding industrial applications of HLDs. PDB Code(s): 3U1TPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90241/1/PRO_2009_sm_suppinfo.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/90241/2/2009_ftp.pd
Effect of Meso-Mammal Nest Predator Activity on Northern Bobwhite Nest Success
Perceived changes in predator-prey dynamics along with documented declines of northern bobwhite (Colinus virginianus) have created a renewed interest from biologists and managers about the role meso-mammals play in shaping bobwhite population trajectories. As part of a larger effort to understand this predator-prey relationship, we evaluated meso-mammal activity on sites where bobwhite demographic data was simultaneously being collected via radio- telemetry. During 1999–2006 we conducted 66 meso-mammal activity surveys using scent stations on 16 sites in 3 southeastern states (Florida, Georgia, and Alabama). We calculated an index of meso-mammal activity (PI), for each site, as the average number of station visits per night by raccoons (Procyon lotor), Virginia opossums (Didelphis virginiana), nine-banded armadillos (Dasypus novemcinctus), bobcats (Lynx rufus) and foxes (Vulpes vulpes, Urocyon cinereoargenteus). We collected bobwhite reproductive information on 2,940 nests (x̄ = 45/site, SE = 2.98) from a total of 4,379 radiotagged bobwhites (x̄ = 67/site, SE = 3.81). The average PI for all sites combined was 0.13 (range = 0.03-0.38, SE = 0.01). Nesting success on the sites ranged from 0.29 to 0.72 and averaged 0.52 (SE = 0.01). We used a mixed effects logistic regression model including site as a random effect and observed a negative relationship between the PI and nesting success (β = -1.53 ± 0.72 SE). Our results suggest that meso-mammal activity affects bobwhite nest success, thus, predator management may be warranted at times on some sites to maximize productivity. Future research and modeling efforts should explore the impacts of meso-mammal activity on population growth rates and stability, especially in varying spatial contexts
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