Sayres et al. 2008
Sayres, D.S., J.B. Smith, J.V. Pittman, E.M. Weinstock, J.G. Anderson, G. Heymsfield, L. Li, A.M. Fridlind, and A.S. Ackerman, 2008: Validation and determination of ice water content - radar reflectivity relationships during CRYSTAL-FACE: Flight requirements for future comparisons. J. Geophys. Res., 113, D05208, doi:10.1029/2007JD008847.
In situ measurements of cirrus ice water content (IWC) by the Harvard water vapor and total water instruments during CRYSTAL-FACE are compared with remote sensing data made by the Cloud Radar System (CRS) instrument in order to derive and validate an empirical IWC-radar reflectivity (Ze) relationship. The comparisons show that for measurements of in situ IWC and remotely measured radar reflectivity, collocated within 2 kilometers of each other, a single IWC-Ze relationship can be found that fits the data with an uncertainty of $plusminus$ 20-30%. A cloud resolving model shows this level of uncertainty to be consistent with sampling errors associated with comparing two measurements that are not collocated. Uncertainties are quantified in the use of in situ data to validate the retrieval algorithms used to derive the IWC of clouds from remote sensing observations, such as radar reflectivity (Ze). Uncertainties are classified into instrumental uncertainties, uncertainties related to sampling errors, and uncertainties in using a single IWC-Ze relationship to describe a cloud.
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Sayres, D.S., Smith, J.B., Pittman, J.V., Weinstock, E.M., Anderson, J.G., Heymsfield, G., Li, L., Fridlind, A.M., and Ackerman, A.S.: Validation and determination of ice water content - radar reflectivity relationships during CRYSTAL-FACE: Flight requirements for future comparisons, J. Geophys. Res., 113, D05208, doi:10.1029/2007JD008847, 2008.
Sayres, D.S., J.B. Smith, J.V. Pittman, E.M. Weinstock, J.G. Anderson, G. Heymsfield, L. Li, A.M. Fridlind, and A.S. Ackerman (2008), Validation and determination of ice water content - radar reflectivity relationships during CRYSTAL-FACE: Flight requirements for future comparisons, J. Geophys. Res., 113, D05208, doi:10.1029/2007JD008847.
Sayres, D.S., J.B. Smith, J.V. Pittman, E.M. Weinstock, J.G. Anderson, G. Heymsfield, L. Li, A.M. Fridlind, and A.S. Ackerman, 2008: Validation and determination of ice water content - radar reflectivity relationships during CRYSTAL-FACE: Flight requirements for future comparisons. J. Geophys. Res., 113, D05208, doi:10.1029/2007JD008847.
Sayres, D.S., et al. 2008, J. Geophys. Res., 113, D05208, doi:10.1029/2007JD008847.
Sayres DS, Smith JB, Pittman JV, Weinstock EM, Anderson JG, Heymsfield G, Li L, Fridlind AM, Ackerman AS. Validation and determination of ice water content - radar reflectivity relationships during CRYSTAL-FACE: Flight requirements for future comparisons, J Geophys Res 2008;113:D05208. doi:10.1029/2007JD008847.
D.S. Sayres, J.B. Smith, J.V. Pittman, E.M. Weinstock, J.G. Anderson, G. Heymsfield, L. Li, A.M. Fridlind, A.S. Ackerman, J. Geophys. Res. 113, D05208, doi:10.1029/2007JD008847 (2008).
