Galactic cosmic rays and our world.

In summary: The article states that there is a theory that suggests that galactic cosmic rays affected our planet before. It affected the bacteria and algae in the oceans millions of years ago. It's unknown if these high energy electrons from a nearby source would have the same effect as on oceans, but it's still a theory.
  • #1
Heneni
5
0
Recently on nasa's site:

http://science.nasa.gov/headlines/y2008/19nov_cosmicrays.htm


My question is...has there been any studies since 2004 to show the link between galactic cosmic rays, and cloud formation, and/or changes in cloud forming bacteria and/or the effect these have on the marine life especially red tide algae?

Can you point me in any direction?

Heneni
 
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Astronomy news on Phys.org
  • #2
I don't think the ATIC results have anything to do with cloud formation, and/or changes in cloud forming bacteria and/or the effect these have on the marine life especially red tide algae.
 
  • #3
What causes red tide?

Red tide is a natural phenomenon not caused by human beings. When temperature, salinity, and nutrients reach certain levels, a massive increase in Karenia brevis algae occurs. No one knows the exact combination of factors that causes red tide, but some experts believe high temperatures combined with a lack of wind and rainfall are usually at the root of red tide blooms. There are no known ways that humans can control it, but many scientists around the world are studying red tide at present. It's important to remember that red tide has happened before and the Texas marine environment has always recovered.

How, when and where do red tide blooms start?

Texas red tides have occurred from August through February. They typically begin in the Gulf of Mexico. Currents and winds then transport blooms toward shore. The blooms mainly come up along Gulf beaches, and less frequently into bays and estuaries.

. . . .
http://www.tpwd.state.tx.us/landwater/water/environconcerns/hab/redtide/faq.phtml

Where and when red tides occur
Red tide can occur any time during the boating season if weather conditions are right. Dry sunny spells followed by a sudden storm can encourage Alexandrium to multiply, and physical conditions such as winds, tides, and currents can act to contain and concentrate the organisms in one place.

When billions of organisms are present, they may tint the water. A red tide may suddenly appear in localized patches or longshore streamers. A few days or weeks later, the red color disappears. However, it should be noted that water discoloration does not necessarily accompany the presence of toxic phytoplankton blooms. This has been especially true in the Gulf of Maine and off Canada. Some red tide organisms emit a bluish green bioluminescent light that can make the waves glow at night.
http://seagrant.gso.uri.edu/factsheets/redtide.html

It appears more to do with water temperature, water chemistry and nutrients rather than cosmic rays.

I believe that recent theories claiming a strong link between clouds and cosmic radiation have been shown to be incorrect. Perhaps there is a weak link or none at all.
 
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  • #4
I probably put this in the wrong place. :wink: Feel free to move it.

In the article below...it shows that galactic cosmic rays affected our planet before...or this is the theory. It affected the bacteria and algae in the oceans millions of years ago. What I am wondering is if these high energy electrons from a nearby source wouldn't have the same effect as on oceans like it had then.

http://www.space.com/scienceastronomy/061127_milkyway_life.html


Heneni
 

1. What are galactic cosmic rays?

Galactic cosmic rays are high-energy particles that originate from outside our solar system. They are mainly composed of protons, but can also contain other atomic nuclei and even electrons.

2. How do galactic cosmic rays affect our world?

Galactic cosmic rays can have a variety of effects on our world. They can cause changes in Earth's atmosphere, disrupt satellite and communication systems, and potentially impact human health.

3. What is the source of galactic cosmic rays?

The exact source of galactic cosmic rays is still being studied by scientists, but they are believed to originate from supernovae, black holes, and other high-energy events in our galaxy.

4. Can galactic cosmic rays be harmful to humans?

Yes, galactic cosmic rays can be harmful to humans, especially astronauts and airline crew members who are exposed to higher levels of radiation. Long-term exposure to galactic cosmic rays can increase the risk of cancer and other health issues.

5. How do scientists study galactic cosmic rays?

Scientists study galactic cosmic rays using a variety of methods, including ground-based detectors, satellite observations, and high-altitude balloon flights. These methods allow them to measure the composition, energy, and direction of galactic cosmic rays, helping us to better understand their impact on our world.

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