Oceanic Histories Edited by David Armitage , Alison Bashford , Sujit Sivasundaram Frontmatter More Information I
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North America Other Continents
Arctic Ocean Europe North Asia America Atlantic Ocean Pacific Ocean Africa Pacific Ocean South Indian America Ocean Oceania Southern Ocean Antarctica LAND & WATER • The surface of the Earth is covered by approximately 71% water and 29% land. • It contains 7 continents and 5 oceans. Land Water EARTH’S HEMISPHERES • The planet Earth can be divided into four different sections or hemispheres. The Equator is an imaginary horizontal line (latitude) that divides the earth into the Northern and Southern hemispheres, while the Prime Meridian is the imaginary vertical line (longitude) that divides the earth into the Eastern and Western hemispheres. • North America, Earth’s 3rd largest continent, includes 23 countries. It contains Bermuda, Canada, Mexico, the United States of America, all Caribbean and Central America countries, as well as Greenland, which is the world’s largest island. North West East LOCATION South • The continent of North America is located in both the Northern and Western hemispheres. It is surrounded by the Arctic Ocean in the north, by the Atlantic Ocean in the east, and by the Pacific Ocean in the west. • It measures 24,256,000 sq. km and takes up a little more than 16% of the land on Earth. North America 16% Other Continents 84% • North America has an approximate population of almost 529 million people, which is about 8% of the World’s total population. 92% 8% North America Other Continents • The Atlantic Ocean is the second largest of Earth’s Oceans. It covers about 15% of the Earth’s total surface area and approximately 21% of its water surface area. -
Effects of Europe's Commercial Expansion Into the Indian Ocean On
Effects of Europe’s Commercial Expansion into the Indian Ocean on Asian and African Coastal Economies, 1600-1650 Johannes Lang 8GRG Neulandschule Grinzing Alfred Wegener-Gasse 10-12 1190 Wien 29.1.2016 Betreut von Mag. Ruth Schabauer Abstract This work examines the impact of Europeans’ commercial expansion into the Indian Ocean on the local Asian and African economies between 1600 and 1650. By studying this historically important period of time, we can also gain a deeper understanding of modern globalization and of Europe’s continuing political and economic influence today. The different consequences for the various regions bordering the Indian Ocean are compared, contrasted, and evaluated. For my research I use primarily books and articles but also rely on the analysis of economic data. Epic poems from Mughal writers as well as modern studies are included so that the reader may gain thorough insights into the topic. As I try to tell history from an Afro-Asian perspective, I let both 17th century and contemporary voices native to the Indian Ocean have their say. I conclude in my study that the consequences of trade with the Europeans differed greatly between the heterogeneous regions. The nature of these consequences depended on the socioeconomic structure as well as on the environmental particularities of the regions in question. Some economies profited from the new situation; others suffered from the altered trade system. Interestingly, many effects of 17th century globalization, such as increased competition with countries far away and a heightened reliance on foreign trade, are visible also in today’s process of globalization. -
Hydrothermal Vents. Teacher's Notes
Hydrothermal Vents Hydrothermal Vents. Teacher’s notes. A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues. They are usually volcanically active. Seawater penetrates into fissures of the volcanic bed and interacts with the hot, newly formed rock in the volcanic crust. This heated seawater (350-450°) dissolves large amounts of minerals. The resulting acidic solution, containing metals (Fe, Mn, Zn, Cu) and large amounts of reduced sulfur and compounds such as sulfides and H2S, percolates up through the sea floor where it mixes with the cold surrounding ocean water (2-4°) forming mineral deposits and different types of vents. In the resulting temperature gradient, these minerals provide a source of energy and nutrients to chemoautotrophic organisms that are, thus, able to live in these extreme conditions. This is an extreme environment with high pressure, steep temperature gradients, and high concentrations of toxic elements such as sulfides and heavy metals. Black and white smokers Some hydrothermal vents form a chimney like structure that can be as 60m tall. They are formed when the minerals that are dissolved in the fluid precipitates out when the super-heated water comes into contact with the freezing seawater. The minerals become particles with high sulphur content that form the stack. Black smokers are very acidic typically with a ph. of 2 (around that of vinegar). A black smoker is a type of vent found at depths typically below 3000m that emit a cloud or black material high in sulphates. White smokers are formed in a similar way but they emit lighter-hued minerals, for example barium, calcium and silicon. -
Introduction to Co2 Chemistry in Sea Water
INTRODUCTION TO CO2 CHEMISTRY IN SEA WATER Andrew G. Dickson Scripps Institution of Oceanography, UC San Diego Mauna Loa Observatory, Hawaii Monthly Average Carbon Dioxide Concentration Data from Scripps CO Program Last updated August 2016 2 ? 410 400 390 380 370 2008; ~385 ppm 360 350 Concentration (ppm) 2 340 CO 330 1974; ~330 ppm 320 310 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 Year EFFECT OF ADDING CO2 TO SEA WATER 2− − CO2 + CO3 +H2O ! 2HCO3 O C O CO2 1. Dissolves in the ocean increase in decreases increases dissolved CO2 carbonate bicarbonate − HCO3 H O O also hydrogen ion concentration increases C H H 2. Reacts with water O O + H2O to form bicarbonate ion i.e., pH = –lg [H ] decreases H+ and hydrogen ion − HCO3 and saturation state of calcium carbonate decreases H+ 2− O O CO + 2− 3 3. Nearly all of that hydrogen [Ca ][CO ] C C H saturation Ω = 3 O O ion reacts with carbonate O O state K ion to form more bicarbonate sp (a measure of how “easy” it is to form a shell) M u l t i p l e o b s e r v e d indicators of a changing global carbon cycle: (a) atmospheric concentrations of carbon dioxide (CO2) from Mauna Loa (19°32´N, 155°34´W – red) and South Pole (89°59´S, 24°48´W – black) since 1958; (b) partial pressure of dissolved CO2 at the ocean surface (blue curves) and in situ pH (green curves), a measure of the acidity of ocean water. -
India in the Indian Ocean Donald L
Naval War College Review Volume 59 Article 6 Number 2 Spring 2006 India in the Indian Ocean Donald L. Berlin Follow this and additional works at: https://digital-commons.usnwc.edu/nwc-review Recommended Citation Berlin, Donald L. (2006) "India in the Indian Ocean," Naval War College Review: Vol. 59 : No. 2 , Article 6. Available at: https://digital-commons.usnwc.edu/nwc-review/vol59/iss2/6 This Article is brought to you for free and open access by the Journals at U.S. Naval War College Digital Commons. It has been accepted for inclusion in Naval War College Review by an authorized editor of U.S. Naval War College Digital Commons. For more information, please contact [email protected]. Color profile: Generic CMYK printer profile Composite Default screen Berlin: India in the Indian Ocean INDIA IN THE INDIAN OCEAN Donald L. Berlin ne of the key milestones in world history has been the rise to prominence Oof new and influential states in world affairs. The recent trajectories of China and India suggest strongly that these states will play a more powerful role in the world in the coming decades.1 One recent analysis, for example, judges that “the likely emergence of China and India ...asnewglobal players—similar to the advent of a united Germany in the 19th century and a powerful United States in the early 20th century—will transform the geopolitical landscape, with impacts potentially as dramatic as those in the two previous centuries.”2 India’s rise, of course, has been heralded before—perhaps prematurely. How- ever, its ascent now seems assured in light of changes in India’s economic and political mind-set, especially the advent of better economic policies and a diplo- macy emphasizing realism. -
Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future
Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future As more and more states are incorporating projections of sea-level rise into coastal planning efforts, the states of California, Oregon, and Washington asked the National Research Council to project sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account the many factors that affect sea-level rise on a local scale. The projections show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections; north of that point, sea-level rise is projected to be less than global projections because seismic strain is pushing the land upward. ny significant sea-level In compliance with a rise will pose enor- 2008 executive order, mous risks to the California state agencies have A been incorporating projec- valuable infrastructure, devel- opment, and wetlands that line tions of sea-level rise into much of the 1,600 mile shore- their coastal planning. This line of California, Oregon, and study provides the first Washington. For example, in comprehensive regional San Francisco Bay, two inter- projections of the changes in national airports, the ports of sea level expected in San Francisco and Oakland, a California, Oregon, and naval air station, freeways, Washington. housing developments, and sports stadiums have been Global Sea-Level Rise built on fill that raised the land Following a few thousand level only a few feet above the years of relative stability, highest tides. The San Francisco International Airport (center) global sea level has been Sea-level change is linked and surrounding areas will begin to flood with as rising since the late 19th or to changes in the Earth’s little as 40 cm (16 inches) of sea-level rise, a early 20th century, when climate. -
ICRI Indian Ocean Factsheet
Indian Ocean Factsheet Communicating the Economic and Social Importance of Coral Reefs for Indian Ocean countries This fact sheet will provide you with information extracted from economic studies Indian Ocean Factsheet BASICS Coral reefs are among the most productive ecosystems on the planet. They cover less than 1% of the ocean floor but support 25% of ocean life. Coral reefs provide beautiful seascapes which allow for a range of recreational activities and improve the attractiveness of the country for international tourism markets. Coral reefs absorb a huge amount of swell energy from waves, protecting lives, coastal properties and beaches from flooding events and hurricanes. Many fisheries exist only due to the presence of coral reefs, whether as nurseries or adult habitats. This sector provides food and incomes for fishers and associated industries. More than 65% of reefs in the region are at risk from local threats, with one-third rated at high or very high risk. Primary threats are man made - unsustainable fishing, land based sources of marine pollution (including sedimentation) and more recently Global Climate Change. Local solutions exist !! Developing networks of Marine Protected Areas, implementing sustainable fishing practices (especially protecting herbivores) and improving water quality are local actions that could increase the resilience of coral reefs to global threats. Reefs at Risk in the Indian Ocean Indian Ocean Factsheet REGIONAL DATA Estimates show the 28,000 km2 of reefs in the Indian Ocean provide tangible benefits of at least US$2b annually to the economies of the countries. Tourism benefits represent 70% of this value with Fisheries representing the remainer. -
Causes of Sea Level Rise
FACT SHEET Causes of Sea OUR COASTAL COMMUNITIES AT RISK Level Rise What the Science Tells Us HIGHLIGHTS From the rocky shoreline of Maine to the busy trading port of New Orleans, from Roughly a third of the nation’s population historic Golden Gate Park in San Francisco to the golden sands of Miami Beach, lives in coastal counties. Several million our coasts are an integral part of American life. Where the sea meets land sit some of our most densely populated cities, most popular tourist destinations, bountiful of those live at elevations that could be fisheries, unique natural landscapes, strategic military bases, financial centers, and flooded by rising seas this century, scientific beaches and boardwalks where memories are created. Yet many of these iconic projections show. These cities and towns— places face a growing risk from sea level rise. home to tourist destinations, fisheries, Global sea level is rising—and at an accelerating rate—largely in response to natural landscapes, military bases, financial global warming. The global average rise has been about eight inches since the centers, and beaches and boardwalks— Industrial Revolution. However, many U.S. cities have seen much higher increases in sea level (NOAA 2012a; NOAA 2012b). Portions of the East and Gulf coasts face a growing risk from sea level rise. have faced some of the world’s fastest rates of sea level rise (NOAA 2012b). These trends have contributed to loss of life, billions of dollars in damage to coastal The choices we make today are critical property and infrastructure, massive taxpayer funding for recovery and rebuild- to protecting coastal communities. -
Natural Variability of the Arctic Ocean Sea Ice During the Present Interglacial
Natural variability of the Arctic Ocean sea ice during the present interglacial Anne de Vernala,1, Claude Hillaire-Marcela, Cynthia Le Duca, Philippe Robergea, Camille Bricea, Jens Matthiessenb, Robert F. Spielhagenc, and Ruediger Steinb,d aGeotop-Université du Québec à Montréal, Montréal, QC H3C 3P8, Canada; bGeosciences/Marine Geology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 27568 Bremerhaven, Germany; cOcean Circulation and Climate Dynamics Division, GEOMAR Helmholtz Centre for Ocean Research, 24148 Kiel, Germany; and dMARUM Center for Marine Environmental Sciences and Faculty of Geosciences, University of Bremen, 28334 Bremen, Germany Edited by Thomas M. Cronin, U.S. Geological Survey, Reston, VA, and accepted by Editorial Board Member Jean Jouzel August 26, 2020 (received for review May 6, 2020) The impact of the ongoing anthropogenic warming on the Arctic such an extrapolation. Moreover, the past 1,400 y only encom- Ocean sea ice is ascertained and closely monitored. However, its pass a small fraction of the climate variations that occurred long-term fate remains an open question as its natural variability during the Cenozoic (7, 8), even during the present interglacial, on centennial to millennial timescales is not well documented. i.e., the Holocene (9), which began ∼11,700 y ago. To assess Here, we use marine sedimentary records to reconstruct Arctic Arctic sea-ice instabilities further back in time, the analyses of sea-ice fluctuations. Cores collected along the Lomonosov Ridge sedimentary archives is required but represents a challenge (10, that extends across the Arctic Ocean from northern Greenland to 11). Suitable sedimentary sequences with a reliable chronology the Laptev Sea were radiocarbon dated and analyzed for their and biogenic content allowing oceanographical reconstructions micropaleontological and palynological contents, both bearing in- can be recovered from Arctic Ocean shelves, but they rarely formation on the past sea-ice cover. -
OCEAN WARMING • the Ocean Absorbs Most of the Excess Heat from Greenhouse Gas Emissions, Leading to Rising Ocean Temperatures
NOVEMBER 2017 OCEAN WARMING • The ocean absorbs most of the excess heat from greenhouse gas emissions, leading to rising ocean temperatures. • Increasing ocean temperatures affect marine species and ecosystems. Rising temperatures cause coral bleaching and the loss of breeding grounds for marine fishes and mammals. • Rising ocean temperatures also affect the benefits humans derive from the ocean – threatening food security, increasing the prevalence of diseases and causing more extreme weather events and the loss of coastal protection. • Achieving the mitigation targets set by the Paris Agreement on climate change and limiting the global average temperature increase to well below 2°C above pre-industrial levels is crucial to prevent the massive, irreversible impacts of ocean warming on marine ecosystems and their services. • Establishing marine protected areas and putting in place adaptive measures, such as precautionary catch limits to prevent overfishing, can protect ocean ecosystems and shield humans from the effects of ocean warming. The distribution of excess heat in the ocean is not What is the issue? uniform, with the greatest ocean warming occurring in The ocean absorbs vast quantities of heat as a result the Southern Hemisphere and contributing to the of increased concentrations of greenhouse gases in subsurface melting of Antarctic ice shelves. the atmosphere, mainly from fossil fuel consumption. The Fifth Assessment Report published by the Intergovernmental Panel on Climate Change (IPCC) in 2013 revealed that the ocean had absorbed more than 93% of the excess heat from greenhouse gas emissions since the 1970s. This is causing ocean temperatures to rise. Data from the US National Oceanic and Atmospheric Administration (NOAA) shows that the average global sea surface temperature – the temperature of the upper few metres of the ocean – has increased by approximately 0.13°C per decade over the past 100 years. -
The Complicating Sea: the Indian Ocean As Method
The Complicating Sea: The Indian Ocean as Method Isabel Hofmeyr Comparative Studies of South Asia, Africa and the Middle East, Volume 32, Number 3, 2012, pp. 584-590 (Article) Published by Duke University Press For additional information about this article http://muse.jhu.edu/journals/cst/summary/v032/32.3.hofmeyr.html Access provided by University Of Pennsylvania (13 May 2014 11:12 GMT) The Complicating Sea: The Indian Ocean as Method Isabel Hofmeyr cross a number of domains, the Indian Ocean has moved to the fore. For interna- tional relations experts and foreign policy commentators, the Indian Ocean world represents a strategic arena where the forces shaping a post- American world intersect most visibly. These include the rise of India and China as major economic powers and Sino- Indian competition over oil sea- lanes and African markets and minerals. In a recent book Monsoon: The Indian Ocean and the Future of American Power, security analyst Robert Kaplan describes the Indian Ocean as a zone “where global power dynamics will be revealed.” 1 It is the “coming strategic arena of the twenty- first century.” 2 Within the academy, as transnational and oceanic forms of analysis become more prom- inent, the Indian Ocean attracts attention, especially as a domain that offers rich possibilities for working beyond the templates of the nation- state and area studies. Importantly, the Indian Ocean makes visible a range of lateral networks that fall within the Third World or Global South. It is hence of particular relevance to those pursuing post – area studies scholarship and has much to say to the themes of this special issue on comparative literature across Africa, the Middle East, and South Asia. -
The Great Rift Valley the Great Rift Valley Stretches from the Floor of the Valley Becomes the Bottom Southwest Asia Through Africa
--------t---------------Date _____ Class _____ Africa South of the Sahara Environmental Case Study The Great Rift Valley The Great Rift Valley stretches from the floor of the valley becomes the bottom Southwest Asia through Africa. The valley of a new sea. is a long, narrow trench: 4,000 miles (6,400 The Great Rift Valley is the most km) long but only 30-40 miles (48-64 km) extensive rift on the Earth's surface. For wide. It begins in Southwest Asia, where 30 million years, enormous plates under it is occupied by the Jordan River and neath Africa have been pulling apart. the Dead Sea. It widens to form the basin Large earthquakes have rumbled across of the Red Sea. In Africa, it splits into an the land, causing huge chunks of the eastern and western branch. The Eastern Earth's crust to collapse. Rift extends all the way to the shores of Year after year, the crack that is the the Indian Ocean in Mozambique. Great Rift Valley widens a bit. The change is small and slow-just a few centimeters A Crack in the Ea rth Most valleys are carved by rivers, but the Great Rift Valley per year. Scientists believe that eventually is different. Violent forces in the Earth the continent will rip open at the Indian caused this valley. The rift is actually Ocean. Seawater will pour into the rift, an enormous crack in the Earth's crust. flooding it all the way north to the Red Along the crack, Africa is slowly but surely splitting in two.