The Berkeley Earth Land/Ocean Temperature Record




A global land–ocean temperature record has been created by combining the Berkeley Earth monthly land temperature field with spatially kriged version of the HadSST3 dataset. This combined product spans the period from 1850 to present and covers the majority of the Earth’s surface: approximately 57 % in 1850, 75 % in 1880, 95 % in 1960, and 99.9 % by 2015. It includes average temperatures in 1∘×1∘ lat–long grid cells for each month when available. It provides a global mean temperature record quite similar to records from Hadley’s HadCRUT4, NASA’s GISTEMP, NOAA’s GlobalTemp, and Cowtan and Way and provides a spatially complete and homogeneous temperature field. Two versions of the record are provided, treating areas with sea ice cover as either air temperature over sea ice or sea surface temperature under sea ice, the former being preferred for most applications. The choice of how to assess the temperature of areas with sea ice coverage has a notable impact on global anomalies over past decades due to rapid warming of air temperatures in the Arctic. Accounting for rapid warming of Arctic air suggests ∼ 0.1 C additional global-average temperature rise since the 19th century than temperature series that do not capture the changes in the Arctic. Updated versions of this dataset will be presented each month at the Berkeley Earth website (, last access: November 2020), and a convenience copy of the version discussed in this paper has been archived and is freely available at (Rohde and Hausfather, 2020).

Author(s): Robert A. Rohde1 and Zeke Hausfather1,2

Rohde, R. A. and Hausfather, Z.: The Berkeley Earth Land/Ocean Temperature Record, Earth Syst. Sci. Data, 12, 3469–3479,, 2020.

Publication Date: 17 Dec 2020

Publication Site: Earth System Science Data

Sex Bias in Graduate Admissions: Data from Berkeley




Examination of aggregate data on graduate admissions to the University of California, Berkeley, for fall 1973 shows a clear but misleading pattern of bias against female applicants. Examination of the disaggregated data reveals few decision-making units that show statistically significant departures from expected frequencies of female admissions, and about as many units appear to favor women as to favor men. If the data are properly pooled, taking into account the autonomy of departmental decision making, thus correcting for the tendency of women to apply to graduate departments that are more difficult for applicants of either sex to enter, there is a small but statistically significant bias in favor of women. The graduate departments that are easier to enter tend to be those that require more mathematics in the undergraduate preparatory curriculum. The bias in the aggregated data stems not from any pattern of discrimination on the part of admissions committees, which seem quite fair on the whole, but apparently from prior screening at earlier levels of the educational system. Women are shunted by their socialization and education toward fields of graduate study that are generally more crowded, less productive of completed degrees, and less well funded, and that frequently offer poorer professional employment prospects.

 07 Feb 1975:
Vol. 187, Issue 4175, pp. 398-404
DOI: 10.1126/science.187.4175.398

Author(s): P. J. Bickel, E. A. Hammel, J. W. O’Connell

Publication Date: 7 February 1975

Publication Site: Science

Charging patients just $10 more for medications leads to more deaths



Researchers at Harvard University and the University of California Berkeley examined what happened when Medicare beneficiaries faced an increase in their out-of-pocket costs for prescription drugs. They found that a 34 percent increase (a $10.40 increase per drug) led to a significant decrease in patients filling their prescriptions — and, eventually, a 33 percent increase in mortality.

The rise in deaths resulted from people indiscriminately cutting back on medications when they had to pay more for them, including drugs for heart disease, hypertension, asthma, and diabetes.


It is difficult to come up with a study design that directly measures the effect of health insurance on health outcomes. These researchers overcame that problem by tracking the prescription benefits for people newly enrolling in Medicare when they turn 65. People with birthdays earlier in the year would be more likely to face higher out-of-pocket costs than people with birthdays later in the year, given the way Medicare’s benefits are designed. By comparing the data between the different age groups, using as a baseline an estimate of how much the patients would have been expected to spend without any cost-sharing, the researchers were able to isolate the effect of cost-sharing on the use of prescription drugs and mortality rates for patients.

Author(s): Dylan Scott

Publication Date: 10 February 2021

Publication Site: Vox