Warm nights increasing cold nights decreasing

  • No School
  • AA 1
  • 35

This preview shows page 8 - 15 out of 35 pages.

Warm nights increasing Cold nights decreasing Frequency of occurrence of cold or warm temperatures for 202 global stations for 3 time periods:1901 to 1950 (black), 1951 to 1978 ( blue ) and 1979 to 2003 ( red ).
Image of page 8

Subscribe to view the full document.

Proportion of extreme precipitation events increasing in most areas NH Winter NH Summer The frequency of heavy precipitation events has increased over most land areas - consistent with warming and increases of atmospheric water vapor while more intense and longer droughts have been observed since the 1970s, particularly in the tropics and subtropics.
Image of page 9
Greenhouse gas concentrations Compared to natural changes over the past 10,000 years, the spike in concentrations of CO 2 & CH 4 in the past 250 years is extraordinary. Humans are responsible for the recent dramatic increase emissions. Fossil CO 2 & CH 4 lack carbon-14, and the observed drop in atmospheric C-14 is measurable. (IPCC AR4 WG1, 2007)
Image of page 10

Subscribe to view the full document.

Best estimate of global radiative forcing
Image of page 11
Ranges of projected surface warming multi-model averages for different emission scenarios and assessed ranges of warming (IPCC AR4, 2007)
Image of page 12

Subscribe to view the full document.

Projected surface temperature changes for the early and late 21st century relative to the period 1980–1999 Continents Warm 50% more than oceans
Image of page 13
Observed & simulated continental & global scale changes in surface temperature observed change (black line); climate models simulations using natural (blue) and anthropogenic (red) forcings
Image of page 14

Subscribe to view the full document.

Image of page 15

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes