Southern ocean carbon and heat impact on climate.

The Southern Ocean greatly contributes to the regulation of the global climate by controlling important heat and carbon exchanges between the atmosphere and the ocean. Rates of climate change on decadal timescales are therefore impacted by oceanic processes taking place in the Southern Ocean, yet too little is known about these processes. Limitations come both from the lack of observations in this extreme environment and its inherent sensitivity to intermittent processes at scales that are not well captured in current Earth system models. The Southern Ocean Carbon and Heat Impact on Climate programme was launched to address this knowledge gap, with the overall objective to understand and quantify variability of heat and carbon budgets in the Southern Ocean through an investigation of the key physical processes controlling exchanges between the atmosphere, ocean and sea ice using a combination of observational and modelling approaches. Here, we provide a brief overview of the programme, as well as a summary of some of the scientific progress achieved during its first half. Advances range from new evidence of the importance of specific processes in Southern Ocean ventilation rate (e.g. storm-induced turbulence, sea-ice meltwater fronts, wind-induced gyre circulation, dense shelf water formation and abyssal mixing) to refined descriptions of the physical changes currently ongoing in the Southern Ocean and of their link with global climate. This article is part of a discussion meeting issue 'Heat and carbon uptake in the Southern Ocean: the state of the art and future priorities'.

Sustaining observations in the polar oceans.

Polar oceans present a unique set of challenges to sustained observations. Sea ice cover restricts navigation for ships and autonomous measurement platforms alike, and icebergs present a hazard to instruments deployed in the upper ocean and in shelf seas. However, the important role of the poles in the global ocean circulation provides ample justification for sustained observations in these regions, both to monitor the rapid changes taking place, and to better understand climate processes in these traditionally poorly sampled areas. In the past, the vast majority of polar measurements took place in the summer. In recent years, novel techniques such as miniature CTD (conductivity-temperature-depth) tags carried by seals have provided an explosion in year-round measurements in areas largely inaccessible to ships, and, as ice avoidance is added to autonomous profiling floats and gliders, these promise to provide further enhancements to observing systems. In addition, remote sensing provides vital information about changes taking place in sea ice cover at both poles. To make these observations sustainable into the future, improved international coordination and collaboration is necessary to gain optimum utilization of observing networks.

Fable comprehension by children with learning disabilities.

Seven fables were read to 14 average learners and 14 children with learning disabilities, all of whom ranged in age from 10 to 13 years. They were presented with four possible moral choices: one correct, one related, and two incorrect. They were instructed to select the correct moral choice and were asked to explain their choice. The average learners' ability to select the correct moral was significantly better than that of the children with learning disabilities. In addition, even when they chose correct morals, the children with learning disabilities were less capable of explaining their choice.

Temporal clause comprehension in fluent and nonfluent aphasics.

Ten fluent and ten nonfluent aphasics participated in this study. Their ability to comprehend before and after clauses which mirrored the order of occurrence and those which did not mirror the order of events was investigated. Results indicate that type of aphasia was not a significant variable related to comprehension but that sentence type was a significant variable. Aphasics' comprehend before clauses better than after clauses. Nonfluent aphasics were able to comprehend those temporal clauses that mirror the order of occurrence better than those that do not. Order of mention was not a significant factor related to comprehension in the fluent group.

Communication and sensorimotor functioning in children with autism.

This study examined the relationship between sensorimotor functioning and communicative intent in children with autism. Ten children with autism, four verbal and six nonverbal, served as subjects. Sensorimotor functioning was assessed on object permanence, means-end, causality, vocal and gestural imitation, the construction of objects in space and schemes for relating objects. A 2-hr communication sample was also obtained and analyzed for the number and diversity of pragmatic functions expressed. Object permanence was not significantly related to either the diversity or total number of pragmatic functions. Means-end was significantly related to both of these measures, while vocal imitation was significantly related to the total number of pragmatic functions expressed. In addition, means-end was significantly correlated with performance on the vocal and gestural imitation scales.

Reading comprehension in adolescents with learning disabilities: semantic and syntactic effects.

Ninety-two adolescents with learning disabilities were randomly assigned to four groups to determine the effects of semantic and syntactic complexity on the reading comprehension of content area prose. One group served as a control and read a social studies passage without change. The three treatment groups read passages with syntactic and/or semantic modifications. Comprehension was significantly better for those groups reading passages with combined semantic and syntactic modifications and syntactic modifications alone, when compared to the control group. Semantic modifications alone did not significantly improve comprehension.