An examination of the precipitation delivery mechanisms for Dolleman Island, eastern Antarctic Peninsula

Copyright @ 2004 Wiley-BlackwellThe variability of size and source of significant precipitation events were studied at an Antarctic ice core drilling site: Dolleman Island (DI), located on the eastern coast of the Antarctic Peninsula. Significant precipitation events that occur at DI were temporally located in the European Centre for Medium-Range Weather Forecasting (ECMWF) reanalysis data set, ERA-40. The annual and summer precipitation totals from ERA-40 at DI both show significant increases over the reanalysis period. Three-dimensional backwards air parcel trajectories were then run for 5 d using the ECMWF ERA-15 wind fields. Cluster analyses were performed on two sets of these backwards trajectories: all days in the range 1979–1992 (the climatological time-scale) and a subset of days when a significant precipitation event occurred. The principal air mass sources and delivery mechanisms were found to be the Weddell Sea via lee cyclogenesis, the South Atlantic when there was a weak circumpolar trough (CPT) and the South Pacific when the CPT was deep. The occurrence of precipitation bearing air masses arriving via a strong CPT was found to have a significant correlation with the southern annular mode (SAM); however, the arrival of air masses from the same region over the climatological time-scale showed no such correlation. Despite the dominance in both groups of back trajectories of the westerly circulation around Antarctica, some other key patterns were identified. Most notably there was a higher frequency of lee cyclogenesis events in the significant precipitation trajectories compared to the climatological time-scale. There was also a tendency for precipitation trajectories to come from more northerly latitudes, mostly from 50–70°S. The El Niño Southern Oscillation (ENSO) was found to have a strong influence on the mechanism by which the precipitation was delivered; the frequency of occurrence of precipitation from the east (west) of DI increased during El Niño (La Niña) events

Observations of Mira stars with the IOTA/FLUOR interferometer and comparison with Mira star models

We present K'-band observations of five Mira stars with the IOTA interferometer. The interferograms were obtained with the FLUOR fiber optics beam combiner, which provides high-accuracy visibility measurements in spite of time-variable atmospheric conditions. For the M-type Miras X Oph, R Aql, RU Her, R Ser, and the C-type Mira V CrB we derived the uniform-disk diameters 11.7mas, 10.9mas, 8.4mas, 8.1mas, and 7.9mas (+/- 0.3mas), respectively. Simultaneous photometric observations yielded the bolometric fluxes. The derived angular Rosseland radii and the bolometric fluxes allowed the determination of effective temperatures. For instance, the effective temperature of R Aql was determined to be 2970 +/- 110 K. A linear Rosseland radius for R Aql of (250 +100/-60) Rsun was derived from the angular Rosseland radius of 5.5mas +/- 0.2mas and the HIPPARCOS parallax of 4.73mas +/- 1.19mas. The observations were compared with theoretical Mira star models of Bessel et al. (1996) and Hofmann et al. (1998). The effective temperatures of the M-type Miras and the linear radius of R Aql indicate fundamental mode pulsation.Comment: 12 pages, 4 postscript figure

Quenched hadron spectroscopy with improved staggered quark action

We investigate light hadron spectroscopy with an improved quenched staggered quark action. We compare the results obtained with an improved gauge plus an improved quark action, an improved gauge plus standard quark action, and the standard gauge plus standard quark action. Most of the improvement in the spectroscopy results is due to the improved gauge sector. However, the improved quark action substantially reduces violations of Lorentz invariance, as evidenced by the meson dispersion relations.Comment: New references adde

Potential for Southern Hemisphere climate surprises

Climate model results suggest that future climate change in Antarctica will be accompanied by continued strengthening and poleward contraction of the Southern Ocean westerly wind belt. Paleoclimate records suggest past changes in the westerly winds can be abrupt and that healing of the Antarctic ozone hole could lead to poleward contraction of the westerlies and increased meridional atmospheric transport of warm air regionally into Antarctica. An abrupt shift to more meridional circulation could lead to notable changes in moisture availability for extra-Antarctic regions, increased Antarctic ice sheet disintegration and more rapid sea-level rise

School Counselors-in-Training Career Counseling Preparation Assignment

Career counseling is an important skill to attain in training to become a school counselor; however, research has shown that school counselors-in-training need more preparation in terms of career counseling. The author describes an optional career counseling assignment added to a 300-hour school-counseling practicum course provided to 14 students in a southern region university school counseling program. Ten students chose to participate in the assignment and provided pre and post feedback of their experience. Student feedback and practical implications are discussed

School Counselors’ Response to School Shootings: Framework of Recommendations

Despite the many expectations of school counselors in responding effectively to crisis situations, there is a lack of research and comprehensive standards that address best practices for school counselors in terms of preparing for and responding to a school shooting. Using federal guidelines and crisis literature, including studies focused on school counselors’ lived experiences of a school shooting, the author offers a research-informed theoretical framework of recommendations at different phases of a school shooting. The framework of recommendations points out probable hindrances to school counselors’ decision making. School counselors’ awareness of these impediments before experiencing each phase of such a crisis would be of benefit to them. School counselors may also use the framework of recommendations to help them assess their developmental needs in relation to preparing for and responding to a school shooting crisis

School Counselors-in-Training Career Counseling Preparation Assignment

Career counseling is an important skill to attain in training to become a school counselor; however, research has shown that school counselors-in-training need more preparation in terms of career counseling. The author describes an optional career counseling assignment added to a 300-hour school-counseling practicum course provided to 14 students in a southern region university school counseling program. Ten students chose to participate in the assignment and provided pre and post feedback of their experience. Student feedback and practical implications are discussed

The nature and function of the Charles Hyden Goodwill Inn with special emphasis upon its case work

Thesis (M.S.)--Boston University, 1941. This item was digitized by the Internet Archive

School Counselors-in-Training Career Counseling Preparation Assignment

Career counseling is an important skill to attain in training to become a school counselor; however, research has shown that school counselors-in-training need more preparation in terms of career counseling. The author describes an optional career counseling assignment added to a 300-hour school-counseling practicum course provided to 14 students in a southern region university school counseling program. Ten students chose to participate in the assignment and provided pre and post feedback of their experience. Student feedback and practical implications are discussed

How to define the limits of responsibility

Illustration not included in Web versio