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Topic Review
Phosphate Minerals
Phosphate minerals contain the tetrahedrally coordinated phosphate (PO43−) anion along sometimes with arsenate (AsO43−) and vanadate (VO43−) substitutions. Chlorine (Cl−), fluorine (F−), and hydroxide (OH−) anions that also fit into the crystal structure. The phosphate class of minerals is a large and diverse group, however, only a few species are relatively common.
  • 759
  • 14 Nov 2022
Topic Review
Miragaia Longicollum
Miragaia (named after Miragaia, the parish in Portugal and geologic unit where its remains were found) is a long-necked stegosaurid dinosaur. Its fossils have been found in Upper Jurassic rocks in Portugal (Lourinhã Formation, Sobral Unit) and possibly also Wyoming, United States (Morrison Formation). Miragaia has the longest neck known for any stegosaurian, which included at least seventeen vertebrae.
  • 996
  • 14 Nov 2022
Topic Review
Climate Change in Vietnam
Vietnam is considered, in coming decades, to be among the most affected countries by global climate change. A large number of studies that Vietnam is experiencing climate change and will be severely negatively affected in coming decades. These negative effects include sea level rise, salinity intrusion and other hydrological problems like flood, river mouth evolution, sedimentation as well as the increasing frequency of natural hazards such as cold waves, storm surges will all exert negative effects on the country's development and economy including agriculture, aquaculture, road infrastructure, etc. Some issues, such as land subsidence (caused by excessive groundwater extraction) further worsen some of the effects climate change will bring (sea level rise) especially in areas such as the Mekong Delta. The government, NGOs, and citizens have taken various measures to mitigate and adapt to the impact.
  • 633
  • 14 Nov 2022
Topic Review
Emissions Budget
An emissions budget, carbon budget, emissions quota, or allowable emissions, is an upper limit of total carbon dioxide (CO2) emissions associated with remaining below a specific global average temperature. An emissions budget may also be associated with objectives for other related climate variables, such as radiative forcing. Global emissions budgets are calculated according to historical cumulative emissions from fossil fuel combustion, industrial processes, and land-use change, but vary according to the global temperature target that is chosen, the probability of staying below that target, and the emission of other non-CO2 greenhouse gases (GHGs). Global emissions budgets can be further divided into national emissions budgets, so that countries can set specific climate mitigation goals. Emissions budgets are relevant to climate change mitigation because they indicate a finite amount of carbon dioxide that can be emitted over time, before resulting in dangerous levels of global warming. Change in global temperature is independent from the geographic location of these emissions, and is largely independent of the timing of these emissions. In line with the 2018 Special report on Global Warming of 1.5° C by the IPCC, the Mercator Research Institute on Global Commons and Climate Change estimates that the CO2 budget associated with 1.5 °C degrees of warming will be exhausted in 2028 if emissions remain on the current level of the late 2010s. Beyond a 1.5°C temperature rise, the risk of long-lasting and irreversible consequences of climate change increases. An emissions budget may be distinguished from an emissions target, as an emissions target may be internationally or nationally set in accordance with objectives other than a specific global temperature. This includes targets created for their political palatability, rather than ones focused on climate science warnings.
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  • 14 Nov 2022
Topic Review
Late Glacial Interstadial
The Late Glacial Interstadial (LGI) c.14,670 to c.12,890 BP represents the first pronounced warming since the end of the Last Glacial Maximum (LGM). Human populations, which had previously forced into refuge areas, gradually begin to repopulate the Northern Hemisphere's Eurasian landmass and eventually populate North America via Beringia for the first time. Evidence for its occurrence stems from two main types of analysis. The first is the use of oxygen isotope stages (OIS) gathered from stratified deep-sea sediment cores. Samples are gathered and measured for change in isotope levels to determine temperature fluctuation for given periods of time. The second is a proxy measurement, the observation of certain reappearing fauna and flora fossils that can survive only in temperate climates, thus indicating warming trends for a given geographic area. Archaeological evidence of settlement and resettlement in certain areas by humans also serve as proxy measurements. Towards the end of OIS 2 in which the Last Glacial Maximum occurs, the deep-sea sediment cores indicate a gradually warming climate, and the reappearance of certain warm-weather flora and fauna remains throughout the Northern Hemisphere correlate with that trend. The Late Glacial Interstadial was followed by a severe decline in temperatures during the Younger Dryas from c.12,890 to c.11,650 BP.
  • 545
  • 14 Nov 2022
Topic Review
Brown Lake (Stradbroke Island)
Brown Lake (Bummeria) is a perched lake on North Stradbroke Island, in South-East Queensland, Australia. The ecosystem is an example of a coastal non-floodplain sand lake and is characterised by acidic water, nutrient-poor and sandy soil, shrub-like vegetation and wet heathland. Brown Lake is of geographical significance, possessing ecological value. The geomorphology of the ecosystem is representative of the unique parabolic dune ridge systems that formed during the Pleistocene epoch. As a perched lake, the hydrological operations of Brown Lake are highly diverse and complex. The lake is also of cultural significance to the Aboriginal population of North Stradbroke Island, the Quandamooka people, as they possess a spiritual and physical relationship with the ecosystem. The indigenous population care for and protect the landscape, sharing traditional environmental management knowledge. Brown Lake’s cultural heritage and ecological value, along with the environmental damage associated with tourism, has led to increased conservation. The Queensland Government and the Quandamooka Yoolooburrabee Aboriginal Corporation (QYAC) have proposed an improved environmental management plan, combining traditional and contemporary management practices.
  • 1.0K
  • 14 Nov 2022
Topic Review
Pelagic Zone
The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word pelagic is derived from grc πέλαγος (pélagos) 'open sea'. The pelagic zone can be thought of as an imaginary cylinder or water column between the surface of the sea and the bottom. Conditions in the water column change with depth: pressure increases; temperature and light decrease; salinity, oxygen, micronutrients (such as iron, magnesium and calcium) all change. Marine life is affected by bathymetry (underwater topography) such as the seafloor, shoreline, or a submarine seamount, as well as by proximity to the boundary between the ocean and the atmosphere at the ocean surface, which brings light for photosynthesis, predation from above, and wind stirring up waves and setting currents in motion. The pelagic zone refers to the open, free waters away from the shore, where marine life can swim freely in any direction unhindered by topographical constraints. The oceanic zone is the deep open ocean beyond the continental shelf, which contrasts with the inshore waters near the coast, such as in estuaries or on the continental shelf. Waters in the oceanic zone plunge to the depths of the abyssopelagic and further to the hadopelagic. Coastal waters are generally the relatively shallow epipelagic. Altogether, the pelagic zone occupies 1,330 million km3 (320 million mi3) with a mean depth of 3.68 km (2.29 mi) and maximum depth of 11 km (6.8 mi). Pelagic life decreases as depth increases. The pelagic zone contrasts with the benthic and demersal zones at the bottom of the sea. The benthic zone is the ecological region at the very bottom, including the sediment surface and some subsurface layers. Marine organisms such as clams and crabs living in this zone are called benthos. Just above the benthic zone is the demersal zone. Demersal fish can be divided into benthic fish, which are denser than water and rest on the bottom, and benthopelagic fish, which swim just above the bottom. Demersal fish are also known as bottom feeders and groundfish.
  • 2.9K
  • 14 Nov 2022
Topic Review
Ciolo (Apulia)
Ciolo is a narrow coastal inlet and a site of historical and environmental interest, which is located in Apulia, Italy. The location is also known as a geological site and for the presence of numerous sea caves, the largest one being the Grotta del Ciolo. Since October 2006 the Ciolo's area has become part of the Regional Park "Costa Otranto - Santa Maria di Leuca e Bosco di Tricase", created by the Apulia region to protect the eastern coast of Salento, specifically the architectural assets as well as important animal and plant species. The name Ciolo comes from the noun in salentino dialect "ciole", which refers to crows or magpies, which are widespread in this region.
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  • 14 Nov 2022
Topic Review
Techniques for Micro(Nano)Plastics Measurement
Plastics have been massively produced since the 1940s, when society started to consume large quantities of plastics in every segment of our lives, including industry, agriculture, healthcare, and others. The production of plastics has been expanded in the last decades because of their favored characteristics, such as lightness, durability, flexibility, versatility, and cost-effectiveness.
  • 647
  • 14 Nov 2022
Topic Review
Education for Sustainable Development
Education can serve the purpose of trying to mitigate catastrophes, from the climate change education perspective. Therefore, understanding how teachers are engaging with sustainability issues can help to reveal how they cope with it. In a school context, teachers can have a role in enacting an interconnection between critical thinking (CT) as a potentially useful tool and education for sustainable development (ESD), in terms of educating and communicating the importance of sustainability to future generations.
  • 1.5K
  • 14 Nov 2022
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