Assessing long-term changes in forest cover in the South West Development Region. Romania

Given the impact of tropical forest disturbances on atmospheric carbon emissions, biodiversity, and ecosystem productivity, accurate long-term reporting of Land-Use and Land-Cover (LULC) change in the pre-satellite era (<1972) is an imperative. Here, we used a combination of historical (1958) aerial photography and contemporary remote sensing data to map long-term changes in the extent and structure of the tropical forest surrounding Yangambi (DR Congo) in the central Congo Basin. Our study leveraged structure-from-motion and a convolutional neural network-based LULC classifier, using synthetic landscape-based image augmentation to map historical forest cover across a large orthomosaic (~93,431 ha) geo-referenced to ~4.7 ± 4.3 m at submeter resolution. A comparison with contemporary LULC data showed a shift from previously highly regular industrial deforestation of large areas to discrete smallholder farming clearing, increasing landscape fragmentation and providing opportunties for substantial forest regrowth. We estimated aboveground carbon gains through reforestation to range from 811 to 1592 Gg C, partially offsetting historical deforestation (2416 Gg C), in our study area. Efforts to quantify long-term canopy texture changes and their link to aboveground carbon had limited to no success. Our analysis provides methods and insights into key spatial and temporal patterns of deforestation and reforestation at a multi-decadal scale, providing a historical context for past and ongoing forest research in the area.

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Long-Term Changes in Forest Cover in Central Veracruz, Mexico (1993–2014)

Tropical Conservation Science ◽

10.1177/1940082918771089 ◽

2018 ◽

Vol 11 ◽

pp. 194008291877108 ◽

Cited By ~ 2

Author(s):

Jorge Antonio Gómez-Díaz ◽

Kristina Brast ◽

Jan Degener ◽

Thorsten Krömer ◽

Edward Ellis ◽

...

Keyword(s):

Forest Cover ◽

Long Term Changes

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Stones in the South: Decoding Bronze Age Ritual Practices on Gotland

Current Swedish Archaeology ◽

10.37718/csa.2017.20 ◽

2021 ◽

Vol 25 (1) ◽

pp. 227-256

Author(s):

Helene Martinsson-Wallin ◽

Joakim Wehlin

Keyword(s):

Bronze Age ◽

Archaeological Research ◽

The South ◽

West Side ◽

South West ◽

The Bronze Age ◽

Ritual Practices

In this paper, we discuss the ritual practices and ritualization in the Bronze Age society on Got- land based on archaeological investigations of cairn milieus and stone ship contexts. We explore whether erected stones and demarcations on the south to south-west side of the Bronze Age cairns are the norm and whether this phenomenon oc- curred during the Bronze Age. We also discuss whether our archaeological research can support long-term use of cairn milieus for ritual purposes.

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Long-term changes of temperature and humidity regime on Kamchatka Peninsula

Izvestiya TINRO ◽

10.26428/1606-9919-2014-178-217-233 ◽

2014 ◽

Vol 178 (3) ◽

pp. 217-233

Author(s):

Olga A. Shkaberda ◽

Lubov N. Vasilevskaya

Keyword(s):

Warming Trend ◽

Sea Surface ◽

Eastern Coast ◽

Late Winter ◽

Early Winter ◽

The South ◽

Temperature And Precipitation ◽

Long Term Changes ◽

Temperature And Humidity

Changes of temperature and humidity regime in Kamchatka are estimated on the seasonally and annually averaged data of long-term (1951-2009) monitoring on air temperature and precipitation at 10 meteorological stations (2-months natural synoptic seasons are used for averaging, as pre-winter, early winter, late winter, spring, summer, and autumn). Epochs with extremely dry and humid seasons are detected for certain climatic sub-regions of Kamchatka taking into account both temperature and precipitation anomalies (Pedya index - S). Besides, long-term changes of the sea surface temperature in the coastal areas of the Okhotsk and Bering Seas are determined that reflect thermal interaction between the atmosphere and ocean. The warming trend is revealed for the whole investigated region that is the most expressed in the pre-winter and late winter seasons and the less pronounced in the south and north of the Peninsula (slight cooling is observed in its northern and northeastern areas in early winter). The sea surface has a tendency to warm, too, but slower than the air; the greatest warming trend is observed in the coastal Okhotsk Sea in spring and autumn and in the coastal Bering Sea in autumn. Annual precipitation has opposite changes in different parts of the Peninsula: its volume tends to decrease in the north and the south, on the western and northeastern coasts, and in the Kamchatka River valley but tends to increase in the central mountainous area and on the eastern coast.

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NEW JETTIES FOR TUNG-KANG FISHING HARBOR, TAIWAN

Coastal Engineering Proceedings ◽

10.9753/icce.v17.133 ◽

1980 ◽

Vol 1 (17) ◽

pp. 133

Author(s):

Chi-Fu Su

Keyword(s):

Water Depth ◽

The South ◽

Littoral Drift ◽

The North ◽

Study Planning ◽

South West ◽

South West Coast ◽

Three Rivers ◽

North And South

Tung-Kang Fishing Harbor, which is about 16 km to the south of Kaohsiung Harbor, is a river harbor on the south-west coast of Taiwan. This harbor is located at the estuary of the Niu-Pu River, which meets the Tung- Kang River and the Kao-Ping River on the north side, (see Fig. 1) The original north and south jetties were constructed in 1959. Because the entrance is located at the meeting of the three rivers and the water depth at the entrance is shallower than that in the breaking zone, the entrance is easily chocked with sand during the summer season when the south-west wind and waves are strong. Therefore, dredging is always necessary to maintain the required depth. On. the other hand, because of the increasing number of fishing boats and deeper draft, the port cannot function effectively. There-fore, how to keep the required water depth at the entrance and to obtain a wider and stable water basin is an urgent problem with this harbor. Based on the sounding of 1973, the littoral drift is mainly from the south. In the next year the construction of a 176 m long new south jetty was begun to protect the entrance and to facilitate the sedimentation study. In 1975, the Taiwan Fisheries Consultants was appointed to undertake the investigation and long-term planning work. This project includes littoral process study, planning, model test and design. Finally it is recommended that an adequate layout of south and north jetties can solve the problem of accretation of the harbor entrance. The purpose of this paper is to describe some aspects with emphasis on how to prevent the shoaling of the entrance channel located at the meeting of the rivers.

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