Showing papers by "Gregory Thompson published in 2020"

Equity in Teaching Academic Language--An Interdisciplinary Approach.

Abstract: Some argue that supporting minoritized students’ “academic language” (AL) development fosters equity in education. Others contend that AL is hegemonic, and that attempts to teach it perpetu...

Assessing the Impact of Stochastic Perturbations in Cloud Microphysics using GOES-16 Infrared Brightness Temperatures

Abstract: In this study, infrared brightness temperatures (BTs) are used to examine how applying stochastic perturbed parameter (SPP) methodology to the widely-used Thompson-Eidhammer cloud microphys...

Improving the representation of supercooled liquid water in the HARMONIE-AROME weather forecast model

Abstract: A realistic representation of mixed-phase clouds in weather and climate models is essential to accurately simulate the model’s radiative balance and water cycle. In addition, it is important for pr...

Mid-level clouds over the Sahara in a convection-permitting regional model

Abstract: The simulation of Saharan mid tropospheric clouds is investigated with the weather research and forecasting (WRF) regional atmospheric model at convection permitting (4 km) horizontal grid-spacing. We identify two potential problems in such simulations: one that affects cloud cover, and another that affects the mean and geographic patterns of both cloud and precipitation. Our simulations show that using a vertical grid typical of GCMs (38 levels) inhibits the formation of Saharan mid-level clouds. In particular, it underestimates the supercooled water content that often resides at the top of these clouds, in favour of ice which falls out of the cloud quickly. When the vertical resolution becomes high enough to allow layers of supercooled water and ice to exist separately, the simulation of the Saharan mid-level clouds improves significantly. Additional improvement is achieved by using realistic high resolution surface albedo, which also shows that low albedo areas favour the formation of mid-level clouds much more than high albedo ones. The simulation of precipitation on the northern edge of the Sahel is also improved with the use of realistic surface albedo. Overall, despite the disagreement of the simulated and the observed clouds, our results show that using increased resolution and realistic surface albedo seems to fully reproduce their observed radiative effect.

Race in the LCHC autobiography: past, present, and future

Abstract: The purpose of this article is twofold. First, I consider the importance of race in the 50-year history of the Laboratory of Comparative Human Cognition (LCHC) as described in the LCHC Polyphonic A...

Impact of the Hydrometeor Vertical Advection Method on HWRF’s Simulated Hurricane Structure

Abstract: The impact of different hydrometeor advection schemes on TC structure and intensity forecasts is examined through the evaluation of HWRF’s simulation of tropical cyclones using the operatio...

Inferring the Presence of Freezing Drizzle Using Archived Data from the Automated Surface Observing System (ASOS)

Abstract: In its current form, the Automated Surface Observing System (ASOS) provides automated precipitation type reports of rain, snow, and freezing rain. Unknown precipitation can also be reported when the system recognizes precipitation is occurring but cannot classify it. A new method has been developed that can reprocess the raw ASOS 1-min-observation (OMO) data to infer the presence of freezing drizzle. This freezing drizzle derivation algorithm (FDDA) was designed to identify past freezing drizzle events that could be used for aviation product development and evaluation (e.g., Doppler radar hydrometeor classification algorithms, and improved numerical modeling methods) and impact studies that utilize archived datasets [e.g., National Transportation Safety Board (NTSB) investigations of transportation accidents in which freezing drizzle may have played a role]. Ten years of archived OMO data (2005–14) from all ASOS sites across the conterminous United States were reprocessed using the FDDA. Aviation routine weather reports (METARs) from human-augmented ASOS observations were used to evaluate and quantify the FDDA’s ability to infer freezing drizzle conditions. Advantages and drawbacks to the method are discussed. This method is not intended to be used as a real-time situational awareness tool for detecting freezing drizzle conditions at the ASOS but rather to determine periods for which freezing drizzle may have impacted transportation, with an emphasis on aviation, and to highlight the need for improved observations from the ASOS.

Effects of Precision Requests as a Standalone Intervention on Noncompliance of Students with Emotional Disturbance

Abstract: For teachers who work with students with emotional or behavioral disorders (EBD), noncompliance can be a serious problem by impacting their own and others’ access to the curriculum. The precision request (PR) has been recommended as effective in addressing noncompliance, but it has limited support as a sole intervention in a classroom exclusively for students with emotional disturbance. This study used an ABAB (withdrawal) single-case design to demonstrate effects of teachers’ PRs on noncompliance of eight third and fourth grade students with EBD in a self-contained class. PR was shown to increase student compliance (log response ratio effect size = 0.17) with no adverse effects on latency to compliance. Both teacher and students rated the social validity as positive. This finding was corroborated by the teacher’s continued use of PRs after study completion. Implications of the findings for practice and suggestions for future research are included.