Activity 2.2- Cryosphere: Dana Glacier, Sierra Nevada, California

 Original Photo 1883

Dana Glacier, Sierra Nevada, California: Station ric046, USGS (Russell, 1883)

Second Photo 2013

     Dana Glacier, Sierra Nevada, California: The Glacier RePhoto Project (Basagaic, 2013)

Google Earth View 2019

                        Dana Glacier, Sierra Nevada, California (Google Earth, 2019)

Dana Glacier, Central Sierra Nevada, California 1833 to 2019

Problem

The Dana Glacier's retreat in the Sierra Nevada, California serves as a visual narrative of the border crisis of glacial retreat, a complex issue tied to the threat of climate change. From an original image of 1833 to a 2013 photograph and a Google Earth satellite view of 2019, the transformation of Dana Glacier tells a story that extends beyond local boundaries, illustrating a global problem with profound consequences for ecosystems, water resources, and climate dynamics. 

Explanation

I have come to understand that the primary culprit behind diminishing Dana Glacier, along with numerous others, is the indisputable force of climate change. Human activities, particularly deforestation and the burning of fossil fuels, have escalated global temperatures, interrupting the delicate equilibrium between glacier accumulation and ablation. This disconcerting pattern, vividly evident in the retreat of Dana Glacier, indicates a more extensive environmental dilemma.

The retreat of Dana Glacier is not merely a scenic alteration; it disrupts the entire hydrological balance of the region. Glaciers are nature's reservoirs, storing freshwater in frozen form. As they diminish, the regular release of freshwater into downstream areas becomes erratic, posing a direct threat to communities relying on a glacial meltwater for various essential needs, from agriculture to drinking water. 

Witnessing the retreat of Dana Glacier, I can't help but think about the effects on surrounding ecosystems. Plants and animals connected to the glacial environment face unprecedented challenges. Alpine flora, accustomed to the unique conditions around glaciers, might struggle to adapt, while wildlife dependent on glacial meltwater confronts the prospect of scarcity, potentially leading to shifts in migration patterns and a decline in biodiversity. 

While Dana Glacier's retreat is a local concern, its consequences resonate globally. The freshwater released from getting from melting glaciers contributes to rising sea levels, intensifying the risks of coastal flooding and erosion. Morever, the loss of reflective ice surfaces amplifies the absorption of sunlight, creating a feedback loop that causes global warming.

Finally, my exploration of the Dana Glacier's retreat has unveiled the tangled connections between climate change, disrupted hydrological cycles, ecosystem transformations, and worldwide repercussions. Addressing this problem requires a collective effort to mitigate climate change and adapt to the changes already in motion. It underscores the urgency for a comprehensive and sustainable approach to protect our cryospheric landscapes and the delicate balance of our planet's ecosystems.

References

Basagic, Hassan (2012). The Glacier RePhoto Project. Dana Glacier, Sierra Nevada, California: Station ric046, (USGS, 1883; The Glacier RePhoto Project, 2013) Retrieved January 31, 2024 from https://www.hassanbasagic.com/projects/glacier-rephoto-project

Google, Earth (2019). Dana Glacier, Sierra Nevada, California. Retrieved January 31, 2024, from https://earth.google.com/web/search/dana+glacier/@37.89977776,-119.24204918,3308.37201488a,4785.35025778d,35y,-0h,0t,0r/data=CigiJgokCQT5IFP0CzJAEQD5IFP0CzLAGTovhag4UWRAIUEYyPBp1FjAOgMKATA 

Module 1.1 - A Turning Point Event for Environmental Science, Silent Spring- Rachel Carson

 

1. Point of View

    Every human invention carries both blessings and curses, determined by its usage. Rachel Carson, one of the most renowned writers of her time, offered a distinctive perspective on the natural world in her international bestseller book "Silent Spring". She also mentioned that the natural world might result in distinction if humans are unaware of their actions. From Carson's point of view, the balance of nature is a major force in man's survival. But in the current modern world, man is steadily getting control of nature. Carson's perspective warns against indiscriminate chemicals like DDT in our environment, stressing the potential long-term effects on the ecological balance of the natural environment. 

2. Purpose

    The purpose of this video is to present to the audience how Rachel Carson researched the destructive effects of widespread pesticide use on the environment and its inhabitants. Carson changed the kind of concerns people raise about the environment and influenced people to raise concerns to prevent self-destruction. Her book "Silent Spring" played a vital role in initiating discussions and policy changes that eventually led to the establishment of environmental regulations and the ban of certain harmful pesticides.

3. Questions at Issue

    Rachel Carson posed several critical questions and highlighted issues in "Silent Spring" addressing concerns related to the use of pesticides such as DDT  and its impact on the environment. DDT, known for its effectiveness in killing insects and mosquitoes, poses a threat to the natural environment by causing unintended harm to non-target species and disrupting ecosystems. Carson's inquiry went beyond the immediate effects, raising ethical questions about humanity's environmental responsibility and the accountability of industries like "DuPont" producing and promoting chemical pesticides. She also emphasized the importance of public awareness in fostering responsible environmental supervision, "We need to be a little more careful about this". 

 4. Information

     DDT was first synthesized back in the 19th century and remained idle in the lab for decades. Nobody realized what the purpose of it was and how could it be used for the benefit of mankind. In 1939, a Swiss chemist named Paul Müller found out that DDT was a strong pest control agent. During World War II, the U.S. military rushed DDT to American troops for protection from the insect-borne disease named "Typhus". Typhus, spread by lice, could lead to death if left untreated. Naples, a city in Italy, was crowded with people lacking public health safety. A disease like typhus could spread easily in Naples and as a result, thousands of people got sprayed with DDT to fight Typhus. Meanwhile, soldiers in the Pacific theater were fighting malaria more than gunshot wounds, leading to the extensive treatment of whole islands with DDT.

   Amidst the battle for victory by American troops, Rachel Carson sought to bring awareness to what she perceived as a conflict against the Earth. 

5. Interpretation and Inference

    When an epidemic like "Typhus" hit Naples, soldiers were battling malaria while farmers combat crop-damaging bugs, DDT appeared like a blessing in that critical moment. However, Rachel Carson, in her perspective, pointed out that the miraculous chemical, while saving thousands of lives from insect-borne diseases, might have consequences for the environment and its elements. Aquatic creatures, birds, and even humans could potentially become the victims of DDT. Despite the immediate benefits, Carson foresaw that the consequences wouldn't manifest immediately, raising concerns about the long-term impact of chemicals like DDT on the ecosystem. 

6. Concepts

     The main concept that Rachel Carson reflected in "Silent Spring" is how pesticides can build up in animals and plants causing issues for the environment and even for human health. She explained how nature is connected. If we interrupt one part, it can affect many other parts. Carson showed us how nature provides helpful services, but using too many pesticides can mess up this balance and cause problems. Carson suggested being careful and thinking a lot before using chemicals like DDT in nature to avoid unexpected, long-term problems and finally, she challenged humanity to think about the consequences of their actions, especially when it comes to applying pesticides that might bring quick benefits but have long-term issues. 

7. Assumptions

    Farmers had been using DDT which we think of now almost as a "homicidal poison". DDT affects the nervous system and the motor coordinator of the insect. After applying this chemical, insects would feel restlessness, then it would lead to tremors, convulsions, paralysis, and finally death.

   The New York Times reported, "Neapolitans are now throwing DDT at brides instead of rice." More than a million people were sprayed at the city of Naples and the epidemic finally stopped in its tracks. By the middle of 1944, TIME Magazine had pronounced DDT as "One of the greatest scientific discoveries of World War II". 

8. Consequences

    In an article for Reader's Digest, Rachel Carson offered a piece exploring DDT's potential to cause collateral damage to wildlife. Biologists for the Fish and Wildlife Service promptly observed issues when DDT was employed in specific areas- evidence emerged of harm to fish and birds. Despite the significant findings, this crucial information was kept confidential. Recognizing the importance of transparency, Carson took proactive steps to alert the audience to the potential environmental consequences of DDT use. 

Soldier in an Italian home spraying a mixture of DDT and kerosene to control malaria, 1945. National Museum of Health and Medicine

 

Children and DDT, August 15, 1953. Courtesy of Wikimedia Commons. Creative Commons license CC BY-SA 3.0 DE.

References

Conis, E. (2023). Soldier in an Italian home spraying a mixture of DDT and kerosene to control malaria, 1945. National Museum of Health and Medicine. Beyond Silent Spring: An Alternate History of DDT. Science History Institute. Retrieved January 24, 2024, from      https://www.sciencehistory.org/stories/magazine/beyond-silent-spring-an-alternate-history-of-ddt/

Conis, E.(2016). Children and DDT, August 15, 1953. Courtesy of Wikimedia Commons. Creative Commons license CC BY-SA 3.0 DE. DDT Disbelievers: Health and the New Economic Poisons in Georgia after World War II. Retrieved January 24, 2024, from https://southernspaces.org/2016/ddt-disbelievers-health-and-new-economic-poisons-georgia-after-world-war-ii/

YouTube. (2017). YouTube. Retrieved January 24, 2024, from https://www.youtube.com/watch?v=SeJNRaE11A0.

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•  What I Most Look Forward to in My Environment Science Class

When I say the word "Environment", I think of water, air, soil, and rocks which are the main elements of an environment. There are different kinds of environments and I'm looking forward to know them in this class. What I most look forward to in this class is how can we protect our environment at all costs? If we can't protect our environment adequately, it will result in nothing but our own extinction. 

• What I Think This Class Will Be About

In this class, I will do research about the things related to the environment and practices that will make the environment more sustainable. This blog creates an opportunity for me to share findings from my research and concerns with not only with my classmates but also with people worldwide.