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A Tale of Two Hockey Sticks

Real Climate

Two decades ago, the so-called “Hockey Stick” curve , published in 1999 by me and my co-authors (Mann, Bradley and Hughes, 1999) , was featured in the all-important “Summary for Policy Makers” (SPM) of the 2001 IPCC Third Assessment report. The relevant statements in the SPM and Technical Summary are: A.2.2 Cross-Chapter Box 2.1, 1} SPM AR6.

2001 355
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A CERES of fortunate events…

Real Climate

The CERES estimates of the top-of-atmosphere radiative fluxes are available from 2001 to the present. W/m 2 , while the warming from 2000 to 2020 is just a bit less than 0.5ºC, equivalent to a change in of about 2.7 Vahrenholt, "Radiative Energy Flux Variation from 20012020", Atmosphere , vol. Dübal, and F. 1297, 2021.

Radiation 360
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As Drought Grips American West, Irrigation Becomes Selling Point for Michigan

Circle of Blue

Michigan counts nearly 11,000 agricultural wells, 3,800 of them installed from 2010 to 2020. Michigan now counts nearly 11,000 agricultural wells, 3,800 of them installed from 2010 to 2020. In 2020, farmers and livestock operations used 187 billion gallons of water, double the amount in 2009. Is the state prepared for more?

2009 348
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Solar energy output of India is reduced significantly by air pollution

Physics World

That is the conclusion of researchers who have modelled the effects of particulate pollution on solar irradiance in 2001–2018. Having abundant insolation, the country was ranked fifth in the world for solar energy capacity in 2020. Air pollution in India is reducing the energy output of some solar panels as much as 52%. Satellite data.

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The established ground and new ideas

Real Climate

2020) despite their merits, something we discuss in our recent discussion paper. I think common EOFs are a clever concept and have used them as a framework for empirical-statistical downscaling since 2001 (Benestad, 2001). 3383-3438, 2020. 1645-1668, 2001. Benestad, J. Sillmann, T.L. Thorarinsdottir, P.

2001 124
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German Renewable Energy Act (EEG Novelle 2021) - Considerable Changes Proposed

Energy and Climate Law

Enacted in 2001, it survived several amendments and revisions, changing from a feed-in tariff regime to a, specific German, feed-in premium modell. It has been the central backbone of Germany`s energy turnaround, the Renewable Energy Act (Erneuerbare Energien Gesetz).

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Could commercial fusion power plants get us to net zero?

Physics World

That beat the previous record of 100 million kelvin held for 20 seconds by South Korea’s KSTAR reactor in 2020. If their efforts succeed, that would put them well ahead of ITER, which largely froze its design in about 2001 and hasn’t been able to exploit recent huge advances in high-temperature superconducting (HTS) magnets.

2025 133