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  • 1
    Publikationsdatum: 2022-05-26
    Beschreibung: © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Earth's Future 6 (2018): 80–102, doi:10.1002/2017EF000627.
    Beschreibung: Climate observations are needed to address a large range of important societal issues including sea level rise, droughts, floods, extreme heat events, food security, and freshwater availability in the coming decades. Past, targeted investments in specific climate questions have resulted in tremendous improvements in issues important to human health, security, and infrastructure. However, the current climate observing system was not planned in a comprehensive, focused manner required to adequately address the full range of climate needs. A potential approach to planning the observing system of the future is presented in this article. First, this article proposes that priority be given to the most critical needs as identified within the World Climate Research Program as Grand Challenges. These currently include seven important topics: melting ice and global consequences; clouds, circulation and climate sensitivity; carbon feedbacks in the climate system; understanding and predicting weather and climate extremes; water for the food baskets of the world; regional sea-level change and coastal impacts; and near-term climate prediction. For each Grand Challenge, observations are needed for long-term monitoring, process studies and forecasting capabilities. Second, objective evaluations of proposed observing systems, including satellites, ground-based and in situ observations as well as potentially new, unidentified observational approaches, can quantify the ability to address these climate priorities. And third, investments in effective climate observations will be economically important as they will offer a magnified return on investment that justifies a far greater development of observations to serve society's needs.
    Schlagwort(e): Climate observations ; Climate Observing System Simulation Experiments ; Value of information ; Economic value ; Grand challenges
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 30 (1991), S. 320-329 
    ISSN: 1040-452X
    Schlagwort(e): DNA ; DNA polymerase ; Cell multiplication ; Blastocyst ; Rabbit ; Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: DNA content and DNA polymerase activity were measured on rabbit blastocysts removed from the uterus at 24-hr intervals over the period of days 4-7 postcoitum (pc). Median DNA content increased 53 times over the 72-hr period, from 25.3 ng on day 4 to 1,360 ng on day 7. Median DNA polymerase activity (fmole of radiolabeled nucleotide incorporated in 30 min at 37°C) increased 393-fold from day 4 to day 7: 32.8 to 12,900. These embryos also increased in surface area and volume by34-fold and 6,078-fold, respectively. Litters containing individuals with high DNA content also tended to have similar individuals with high DNA polymerase activity. Therefore, DNA polymerase activity may be a useful measure of the potential for the next cell division. A large amount of variation existed between blastocysts in all parameters measured. An analysis of variance, conducted to partition variation between litters and within litters, determined that within-litter variation was actually greater than that between litters, resulting in intraclass correlation coefficients less than 0.5. There was also a positive regression of DNA content and DNA polymerase activity on surface area in 6- and 7-day-old blastocysts after eliminating variation attributable to litters. The developmental pattern of DNA polymerase activity in the rabbit may be quantitatively different from that described in the mouse. The pattern in mammals is very different from that described in several nonmammalian species.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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