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Abstract U-Pb geochronology by isotope dilution–thermal ionization mass spectrometry (ID-TIMS) has the potential to be the most precise and accurate of the deep time chronometers, especially when applied to high-U minerals such as zircon. Continued analytical improvements have made this technique capable of regularly achieving better than 0.1% precision and accuracy of dates from commonly occurring high-U minerals across a wide range of geological ages and settings. To help maximize the long-term utility of published results, we present and discuss some recommendations for reporting ID-TIMS U-Pb geochronological data and associated metadata in accordance with accepted principles of data management. Further, given that the accuracy of reported ages typically depends on the interpretation applied to a set of individual dates, we discuss strategies for data interpretation. We anticipate that this paper will serve as an instructive guide for geologists who are publishing ID-TIMS U-Pb data, for laboratories generating the data, the wider geoscience community who use such data, and also editors of journals who wish to be informed about community standards. Combined, our recommendations should increase the utility, veracity, versatility, and “half-life” of ID-TIMS U-Pb geochronological data. 

Abstract Comparisons of high‐resolution extended range CCN spectra measured at 100 m altitude with cloud and drizzle microphysics in the Rain in Cumulus over the Ocean (RICO) aircraft field project are presented. CCN concentrations,N_CCN, active at supersaturations,S, >0.1% showed positive relationships with cloud droplet concentrations,N_c, measured at intermediate (606–976 m) and very high altitudes (1,763–3,699 m). These correlation coefficients,R, progressively increased withSwhile the two‐tailed probabilities, P2, progressively decreased with S to < 10⁻⁶at 1.6%S. More important were the positive relationships betweenN_CCNactive atS < 0.1% and drizzle drop concentrations,N_d, at high (977–1,662 m), very high and high‐very high altitudes combined (977–3,699 m). All of these relationships were consistent for eight different cloud liquid water content,L_c, thresholds (forN_c) andL_cbins (forN_d) ranging from 0.0002 to 0.3 g/m³. Negative relationships between CCN modality and low altitude (76–475 m) cloudiness coupled with no relationship ofN_CCNactive at any S withN_cof these low clouds indicated a cloud effect on ambient aerosol. This is a demonstration of clouds causing bimodal aerosol.