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Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff

first_imgIron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable (<0.45 μm) iron (6–81 kg km−2 a−1) than icebergs (0.0–1.2 kg km−2 a−1). Glacier-fed streams also export more acid-soluble iron (27.0–18,500 kg km−2 a−1) associated with suspended sediment than icebergs (0–241 kg km−2 a−1). Significant fluxes of filterable and sediment-derived iron (1–10 Gg a−1 and 100–1,000 Gg a−1, respectively) are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change.last_img read more

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Office of Religious Life hosts vigil for victims of Sri Lanka terror attacks

first_img“This circle represents the world that I think every one of us wants,” he said. “A world where people of different faiths or of no faith tradition at all respect each other, are interested in each other, are curious about each others’ traditions.” During the vigil, attendees formed a circle to pray for victims and offer words of love and hope for the affected communities. Rosie Shawver, director of Campus Ministry at the Caruso Catholic Center, recited a prayer delivered by Pope Francis on Easter. Nearly 25 students, faculty and staff  commemorated the victims of the Sri Lanka terrorist attacks at a vigil Wednesday that emphasized the importance of community, acceptance and peace. The terrorist attacked on Easter Sunday claimed the lives of over 350 people and injured hundreds more across churches and hotels. The prayer also called for peace and acceptance of all people, regardless of religious, political or ideological differences. The event was hosted by the Office of Religious Life and included speakers from Interfaith Council and the Caruso Catholic Center. The Office of Religious Life hosted a vigil Wednesday to commemorate the victims of the Sri Lanka terrorist attacks that claimed the lives of over 350 people and injured hundreds on Easter Sunday. (Natalie Oganesyan/Daily Trojan) “I hope that in time, [the families of the victims, the friends, the neighbors and the people reading the news] find peace and happiness,” read one of the anonymous prayers. “I wish to manifest my affectionate closeness to the Christian community [in Sri Lanka, which was] hit while they were gathered in prayer,’” Shawver recited. “‘And to the victims of such cruel violence, I entrust to the Lord all those who have tragically died, and I pray for the injured who are suffering because of this traumatic event.” Led by the Rev. Jim Burklo, senior associate dean of Religious Life, attendees sang Interfaith chants. Burklo said gathering as a community helps facilitate togetherness and understanding. Noha Ayoub, a senior majoring in law, history and culture, said she felt it was important to gather after a tragedy to express solidarity. Attendees were prompted to write letters offering solidarity and prayer to the victims of the attack. “I think it’s important for us, as human beings, to come together to mourn those that have passed because otherwise what’s our purpose here in life if we’re not here to be together?” Ayoub said. “I think that by being here we’re all stressing how this is not normal and this shouldn’t be normalized and cannot be normalized,” Interfaith Council President Shradha Jain said. “We need to reach out and support our Trojan community, our friends and family who have been affected by this tragic event in Sri Lanka.” “Most importantly, I think there’s a deep sense of vulnerability that our communities on campus are feeling, especially with regards to sacred spaces,” said Jain, a senior majoring in business administration. “I think at USC we can come together to express how warm our hearts are and how we can remain to create safe spaces, sacred spaces amongst each other.” The letters, compiled with other prayers from the USC’s Little Chapel of Silence, were then ceremonially burned in the biannual prayer celebration hosted by the Interfaith Council. The Caruso Catholic Center will host an evening mass on Sunday to memorialize the victims and offer prayers to their families.last_img read more

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