Water worlds: Ocean Chlorophyll levels

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The ocean is the last frontier that has not been discovered by cartogram techniques before. As such, it was an inevitable step in my PhD research some years ago to test the creation of a gridded ocean cartogram, a cartogram that is limited to the extent of the world’s oceans (also linking nicely to my past research on coastal ecosystems).
Chlorophyll concentrations in the world’s oceans are important indicators for the presence of algae and other plant-like organisms that carry out photosynthesis. As such, phytoplankton (which contains the chlorophyll) is an essential element of the food chain in the seas as it provides the food for numerous animals. Variations and changes in the chlorophyll levels are also relevant for the study of the ecology of the sea. Changing chlorophyll levels can indicate changing sea temperatures and other conditions in the oceans that cover about 72 percent of the planet’s surface.

Gridded cartogram visualisation of Ocean Chlorophyll concentrations
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Hyperspectral remote sensing and analysis of intertidal zones: A contribution to monitor coastal biodiversity

The growing amount of remotely sensed data and the ongoing developments in the improvement of spatial and spectral resolutions lead to high expectations. These often inflated expectations are usually not fulfilled. I explored these expectations and aimed to make a contribution to bring them to a more accurate level in research in the field of hyperspectral image analysis of small scale and heterogeneous biotopes in the intertidal zones of coastal areas which I undertook back at my time at the University of Cologne and the Alfred Wegener Institute for Polar and Marine Research Bremerhaven. Here are some insights from my work.

Map overview of the Study Areas on Helgoland and Sylt
Overview of the study area on the islands of Helgoland and Sylt, Germany
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Geographic visualization in social sciences: Draw more maps!

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Wordle Data Visualisation
Geographic visualization in social sciences – or draw more maps! Continue reading

Global tree cover

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There is a long tradition in the emotional relationship between people and forests. We can get an understanding of the extent of the global tree cover from satellite sensors such as NASA’s MODIS
Calculating the average tree cover in an area allows us to estimate the extent of the world’s forests. Forest landscapes can be mapped in various ways and is often done in conventional maps. However, much of the land area is not covered by forest and the few remaining untouched forest landscapes keep shrinking while deforestation continues.

Gridded cartogram visualisation of global tree cover
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In Focus: Wealth on the British Isles

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Political InsightThe debate about the relevance and impact of the super-rich on society has gained greater currency as evidence continues to grow that the widening gap between the poor and the rich has a negative impact on societies as a whole. In otherwise affluent countries where the richest one per cent owns the most, child poverty is common, school attainment is lower and medium household incomes are depressed. Along with reduced average living standards, housing is of poorer quality, and health suffers as anxiety rises.
In an article for the “In Focus” section of Political Insight (December 2014, Volume 5, Issue 3) Danny Dorling and I looked beyond the economic, social, educational and medical implications, focussing on the geographical lessons to learn when wealth concentrates. Where the richest of the rich live, work and where they keep their assets is even more imbalanced than the wider and growing underlying inequalities between rich and poor. In societies where the rich have less they tend to be more spread out across a country, but when the wealth of those at the top rises greatly there is a tendency to congregate – with London a prime example.

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In Focus: European Parliament elections 2014

Political InsightIn an article for the “In Focus” section of Political Insight (September 2014, Volume 5, Issue 2) we looked at the results of this year’s election to the European Parliament.
In May 2014 the citizens of the 28 member states of the European Union (EU) went to the polls to elect the 751 new Members of the European Parliament (MEPs). The distribution of seats in the European Parliament is not directly proportional to each country’s total population. A so-called ‘degressive proportionality’ principle gives small countries a few more seats than what would have been the case if strict proportionality were applied. The voter turnout across the EU was 43%. Belgium and Luxemburg have the highest rate of voter participation (90%). On the other hand, the smallest voter turnout is observed in Slovakia (13%) and the Czech Republic (19.5%), whereas the United Kingdom had the 11th lowest rate in Europe (36%). More than 90% of all elected MEPs belong to one of the seven political groups of the European Parliament. There is a minimum of 25 members needed to form a political group and at least one quarter of all member states must be represented within this group.
The map series in the article presents the geographical distribution of the votes across member states. All countries in these maps are shaded using a rainbow colour scheme, starting with shades of dark red to demarcate the countries with the most recent association with the EU and moving through to a shade of violet for the oldest member states.

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