Observations by interested individuals help us better understand local impacts of climate change. Science researchers work with volunteers through citizen science projects to track changes in annual plant blooming, frog calling, bird ranges, and other natural phenomena. This version opens with an example from the Southwestern United States. A similar version is available highlighting the North East US .

1. Climate Change and Citizen Science

2. In the early 1980’s, David Bertelsen started recording the plants blooming on Mt. Kimball near his Tucson, Arizona home. Hiking the same 10-mile loop over 1,200 times, David started to take note of changes.

3. David saw saguaro cacti start to flower higher and higher on the mountain over time. ` But he also recorded cacti dying off in the desert, and not growing back.

4. David shared 20 years of his detailed notes with researchers from the University of Arizona. Together they saw that ecosystems on Mt. Kimball were changing as temperature and rainfall patterns changed.

5. David Bertelsen is not alone. Across the country and around the world, people in their backyards, neighborhoods, and parks have been observing and recording changes.

6. Scientists now recognize the importance of these records. Careful observations made by interested individuals help to fill in details about how people, plants, and animals respond to a changing climate.

7. Observations by David Bertelsen and others suggest that species in some places are changing their habits as the climate changes.

8. When we say climate change, we mean a recent and unusual rise in global temperature. 14.6 380 Parts per million Degrees C 13.6 260 1880 2000 Carbon Dioxide concentration Average surface temperature Temperatures have been increasing since the late 1880’s, along with a rise in atmospheric carbon dioxide.

9. Carbon dioxide traps heat and warms the earth like a greenhouse. We have added to the natural blanket of carbon dioxide in our atmosphere by burning fossil fuels.

10. Volunteer and professional researchers have watched temperatures suddenly and steadily rise. With rising temperatures, severe weather events around the world have also increased. ~37% % Area with Hot Daily High Temps Heatwaves % Area with Hot Daily Low Temps ~15% ~10% ~4.5 ~3 Hurricane Power Index Atlantic Hurricanes 27.6°C 27.2°C Sea Surface Temp. Heavy Rain Events 15% -13% 0%

11. We are just starting to look at how these changes impact the living things around us. To be certain that changes are related to climate, scientists must have observations from across continents and over long periods of time.

12. Instead of working alone, some researchers now invite volunteers to join large-scale citizen science projects.

13. In citizen science, people everywhere use basic, scientific protocols to report observations of natural events. Hundreds and thousands of participants, all across the landscape, can contribute millions of observations every year, allowing scientists to ask questions they were never before able to answer. eBird data point

14. Here’s an example. Bird enthusiasts like Vivian Pitzrick and Betsy Brooks searched for bird nests every spring in New York state. As part of the Nest Record Card Program, they carefully wrote down observations of each nest throughout the season.

15. Their routine and regular observations, combined with thousands of others across the US and over time, allow scientists to track details of nesting behaviors. Researchers see that tree swallows now nest on average 9 days earlier than they did in 1959.

16. There’s more. Observations by volunteers in the New York State Amphibian and Reptile Atlas Project show that four species of frogs are calling 10-13 days earlier now than in the beginning of the 1900s.

17. Just since 1974, Christmas Bird Count volunteers across North America have seen many species of birds expand their northern ranges.

18. Networks of observers across Europe show that blooming, leafing, and fruiting of plants is happening earlier and earlier.

19. And the observations of participants in the Monarch Larvae Monitoring Project have helped researchers predict that the butterfly’s ideal breeding conditions will be found farther north in the future.

20. Each story on its own is important. Together, they suggest that large-scale changes are taking place.

21. But these observations also suggest new questions to ask: What other natural events are changing, and how? Are the changes we’ve seen here continuing to take place? Are natural events all changing their timing together, or in different ways? Do changes mean species are adapting to climate change, or are they hurt by its effects? And…

22. …how do things compare in your neighborhood? Changes are happening everywhere, and many of these questions can’t be answered without the help of volunteers.

23. Observations that may seem small can be of huge importance. We might not immediately see the importance of, for example, the date of the first cactus bloom. But over time, and with the help of others, a step outside to notice what’s happening in your neighborhood can help us better understand how we all respond to a changing world.

24. Climate change in your backyard? Join a citizen science project and find out! http://www.citizenscience.org/climatechange/citsci

26. Supporting research by… Crimmins et al 2008, 2009 Dunn and Winkler 1999 Gibbs and Breisch 2001 La Sorte and Thompson 2007 Menzel et al 2006 Batalden et al 2007 Parmesan and Yohe 2003 Root et al 2003

27. Images courtesy of… David Bertelsen Kathleen Anderson Cornell Lab of Ornithology NOAA AMC’s MountainWatch Prairies Across Kansas Beaver Creek Reserve OPIHI Flickr and Creative Commons: furryscalyman, anitagould, ontdesign, genista, cocreatr, batintherain, mattlemmon, rune101, tensafefrogs, spooky05

28. Funding and support provided by… National Science Foundation (NSF) Association of Science and Technology Centers (ASTC) Communicating Climate Change (C3) project and partners Cornell Lab of Ornithology NOAA David Bertelsen Kathleen Anderson and family