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Air-breathing vertebrates incorporate a fraction of isotopically anomalous air O2 in their body water. The 17O isotope anomaly of air O2 (expressed as Δ’17Oair) is related to atmospheric CO2 concen ...
Efforts to anticipate and adapt to future climate can benefit from historical experiences. We examine agroclimatic conditions over the past 50 y fo ...
Reconstruct the intertropical convergence zone over the Indo-Pacific Warm Pool with extended records and empirical orthogonal function ...
Discover groundbreaking research on psychological and cognitive sciences, exploring brain function, behavior, and mechanisms shaping human cognition.
Many cities seek to alleviate extreme heat via planting trees. However, the cooling achieved by such programs is debated because previous analyses address scales much smaller than the whole-city scale ...
A Biometric Study of Human Basal MetabolismNutrition Laboratory and Station for Experimental Evolution, Carnegie Institution of Washington ...
Dive into PNAS Front Matter for editorials, interviews, science news, and commentary that offer expert perspective on today’s most important research findings.
The Compressibility of Media under Extreme PressuresNote: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not ...
FUNCTORIAL SEMANTICS OF ALGEBRAIC THEORIES*This constitutes a partial summary of a dissertation submitted in partial fulfillment of the requirement for the degree Doctor of Philosophy at Columbia ...
Feedbacks from terrestrial ecosystems to atmospheric CO 2 concentrations contribute the second-largest uncertainty to projections of future climate. These feedbacks, acting over huge regions and long ...
Using data from rural monitoring sites across the contiguous United States, we evaluated fine particulate matter (PM2.5) trends for 1988–2016. We calculate trends in the policy-relevant 98th quanti ...
It is well known that a jostled string tends to become knotted; yet the factors governing the “spontaneous” formation of various knots are unclear. We performed experiments in which a string was ...
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