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An observationally based evaluation of cloud ice water in CMIP3 and CMIP5 GCMs and contemporary reanalyses using contemporary satellite data


, : An observationally based evaluation of cloud ice water in CMIP3 and CMIP5 GCMs and contemporary reanalyses using contemporary satellite data. Journal of Geophysical Research: Atmospheres 117(D16)

We perform an observationally based evaluation of the cloud ice water content (CIWC) and path (CIWP) of present-day GCMs, notably 20th century CMIP5 simulations, and compare these results to CMIP3 and two recent reanalyses. We use three different CloudSat + CALIPSO ice water products and two methods to remove the contribution from the convective core ice mass and/or precipitating cloud hydrometeors with variable sizes and falling speeds so that a robust observational estimate can be obtained for model evaluations. The results show that for annual mean CIWP, there are factors of 2 10 in the differences between observations and models for a majority of the GCMs and for a number of regions. However, there are a number of CMIP5 models, including CNRM-CM5, MRI, CCSM4 and CanESM2, as well as the UCLA CGCM, that perform well compared to our past evaluations. Systematic biases in CIWC vertical structure occur below the mid-troposphere where the models overestimate CIWC, with this bias arising mostly from the extratropics. The tropics are marked by model differences in the level of maximum CIWC (?250 550 hPa). Based on a number of metrics, the ensemble behavior of CMIP5 has improved considerably relative to CMIP3, although neither the CMIP5 ensemble mean nor any individual model performs particularly well, and there are still a number of models that exhibit very large biases despite the availability of relevant observations. The implications of these results on model representations of the Earth radiation balance are discussed, along with caveats and uncertainties associated with the observational estimates, model and observation representations of the precipitating and cloudy ice components, relevant physical processes and parameterizations.

US$19.90

DOI: 10.1029/2012jd017640


Other references

Kochhar Naresh, 1984: Malani igneous suite; hot-spot magmatism and cratonization of the northern part of the Indian Shield. Journal of the Geological Society of India 25(3): 155-161

Harris, P.L.; Freedman, B.E.; Bland, K.I.; Miller, G.J.; Seeger, J.M.; Woodward, E.R., 1987: Collagen content, histology, and tensile strength: determinants of wound repair in various gastric stapling devices in a canine gastric partition model. Various stapling devices have been applied to create the small gastric pouch necessary for effective weight loss in morbid obesity, but it is unclear as to which staple line arrangement provides the most reliable gastric wound healing. Five varian...

Sai Prasad, T.R.; Chui, C.Hon.; Singaporewalla, F.Reyaz.; Ong, C.Phaik.Caroline.; Low, Y.; Yap, T.Lu.; Jacobsen, A.Sundfor., 2006: Meckel's diverticular complications in children: is laparoscopy the order of the day?. Meckel's diverticulum (MD), a seemingly innocuous anomaly of the gastrointestinal tract, presents distinctive challenges to a clinician, as it is prone to varied complications that are frequently elusive to diagnosis with conventional diagnos...

Rosenberg, D.; Harrington, J.W.; Rice, P.R.; Hiskett, P.A.; Peterson, C.G.; Hughes, R.J.; Lita, A.E.; Nam, S.Woo.; Nordholt, J.E., 2007: Long-distance decoy-state quantum key distribution in optical fiber. The theoretical existence of photon-number-splitting attacks creates a security loophole for most quantum key distribution (QKD) demonstrations that use a highly attenuated laser source. Using ultralow-noise, high-efficiency transition-edge sensor...

Johnson, R., 1982: Developing wheat cultivars with resistance to yellow rust at the Plant Breeding Institute, Cambridge. The procedures used are described and tabulated data are presented on the specific pathogenicity of 8 races of P. striiformis towards known resistance genes, on seedling and adult plant susceptibility to these races in 8 winter wheats bred at Camb...

Kiss, J., 1962: Contribution to the pathogenesis of late radiation injuries. Strahlentherapie 117: 474-478

Titman, A.C., 2016: Transition probability estimates for non-Markov multi-state models. Non-parametric estimation of the transition probabilities in multi-state models is considered for non-Markov processes. Firstly, a generalization of the estimator of Pepe et al., (1991) (Statistics in Medicine) is given for a class of progressive...

Zimmern D., 1975: Translation of tobacco mosaic virus rna and isolation of the messenger for tobacco mosaic virus coat protein. Inserm (institut National De La Sante Et De La Recherche Medicale) Colloque: 1-216

Aslan, C.M., 1989: Common ground in psychoanalysis. Aims and clinical process. As I see it. International Journal of Psycho-Analysis 70: 12-16

Curt, J.R.; Guthrie, W., 1966: Duplication of the ileum presenting as appendicitis in an adult. British Journal of Surgery 53(3): 219-221