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Exposure and physical vulnerability to geo-hydrological hazards in rural environments: A field-based assessment in East Africa
No full textNew data on the jumping spiders (Araneae: Salticidae) from the Nimba Mountains, Guinea
No full textThe results of research on the jumping spiders of the Nimba Mountains (the Guinean part), biodiversity hotspot in West Africa, are presented. A new genus is established, Yeiyei gen. nov. with the type species Yeiyei guiparkeri sp. nov. Thirty species are described as new for science: Bacelarella arcana sp. nov. (♀), B. magnifica sp. nov. (♀), B. regularis sp. nov. (♀), Detalik solitaria sp. nov. (♀), Evarcha albofacialis sp. nov. (♂), E. ampulla sp. nov. (♂), E. difficilis sp. nov. (♀), E. magna sp. nov. (♂), Finger jamisonsuteri sp. nov. (♂♀), Heliocapensis lola sp. nov. (♀), Lamottella mirabilis sp. nov. (♂♀), Lictor newene sp. nov. (♂), Malizna guineensis sp. nov. (♀), M. simplex sp. nov. (♂♀), Menemerus lobatus sp. nov. (♂), Nimbarus acer sp. nov. (♂♀), N. digitatus sp. nov. (♂♀), N. trilobatus sp. nov. (♂), N. zie sp. nov. (♂♀), N. zouguepo sp. nov. (♂♀), Pochytoides consobrinus sp. nov. (♂♀), P. Limpidus sp. nov. (♀), Pulcherula scintillans sp. nov. (♀), Rhene gbakore sp. nov. (♀), Sadies africana sp. nov. (♀), Thiratoscirtus lativittatus sp. nov. (♀), T. seringbarensis sp. nov. (♂), T. similis sp. nov. (♂), T. tibialis sp. nov. (♂) and Yeiyei guiparkeri sp. nov. (♂♀). Two specific names are synonymized: Langona recta Wesołowska and Russell-Smith, 2022 with L. trifoveolata (Lessert, 1927) and Viciria equestris pallida Berland and Millot, 1941 with Vicirionessa equestris (Simon, 1903). Brancus lacrimosus Wesołowska and Edwards, 2012 and Viciria prenanti Berland and Millot, 1941 are removed from their synonymy with Vicirionessa fuscimana (Simon, 1903) and are recognized as synonyms of V. albocincta (Thorell, 1899). The unknown males of Langelurillus horrifer Rollard and Wesołowska, 2002, Menemerus dubius Berland and Millot, 1941 and Gramenca prima Rollard and Wesołowska, 2002, and the unknown females of Asemonea virgea Wesołowska and Szűts, 2003, Lamottella longipes Rollard and Wesołowska, 2002, Nimbarus pratensis Rollard and Wesołowska, 2002, Phintella minor (Lessert, 1925), Pochyta konilokho Wesołowska and Szűts, 2021, Pulcherula magna Wesołowska and Russell-Smith, 2022 and Thyene bucculenta (Gerstaecker, 1873) are described for the first time. As a result of this study, the list of salticids from the Nimba Mountains contains 131 species (previously only 25)
TROPOMI Level 3 tropospheric NO2 dataset with advanced uncertainty analysis from the ESA CCI+ ECV precursor project
Get PDFWe introduce the new ESA Climate Change Initiative TROPOspheric Monitoring Instrument (TROPOMI) global monthly clear-sky Level 3 (L3) dataset of tropospheric nitrogen dioxide (NO2) for May 2018 to December 2021. The dataset provides spatiotemporally averaged tropospheric NO2 columns, associated averaging kernels, and L3 uncertainties at spatial resolutions of 0.2, 0.5, and 1.0° on a monthly timescale (https://doi.org/10.21944/CCI-NO2-TROPOMI-L3, KNMI, 2025). To improve our understanding of what fraction of the Level 2 (L2) uncertainty cancels when averaging over space or time (i.e. the random component of the L2 uncertainty) and what fraction persists despite the averaging (systematic component), we first determine spatial and temporal error correlations for all sources of uncertainty in the L2 retrieval. Spatial error correlations arise mainly from the stratosphere–troposphere correction and from coarse-gridded albedo climatologies used in the L2 air mass factor calculation and have been quantified in previous studies. We find the temporal error correlation in both the stratospheric uncertainty and the air mass factor uncertainty to be 30 %. Using these estimates, the L3 uncertainty budget has been established for every grid cell based on input L2 uncertainties and new methods to estimate spatial and temporal representativeness uncertainties and to propagate measurement uncertainties through space and time. The total relative uncertainty in the resulting L3 dataset is in the range of 15 %–20 % in polluted areas, which is significantly lower than in individual L2 orbit retrievals, and brings the tropospheric NO2 data to within the Global Climate Observing System (GCOS) “goal” and “breakthrough” requirements. Validation of the tropospheric, stratospheric, and total columns confirms better correlation and reduced dispersion in the differences between satellite and ground-based reference data for the L3 data with respect to the underlying L2, albeit with a more pronounced negative bias in the tropospheric columns at pollution hot spots, most probably related to stronger spatial smearing
République Démocratique du Congo, Carte administrative , Province du Sankuru, Territoire de Lodja
No full textAlong the Mekong: a new leaf-toed gecko (Gekkonidae: <i>Dixonius sambhupura</i>) from northeastern Cambodia
No full textWe describe Dixonius sambhupura sp. nov. from the western bank and Koh Klap (island) of the lower Mekong River in Kratie Province, northeastern Cambodia. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 49.0 mm, 14 or 16 longitudinal rows of dorsal tubercles; 34 to 37 paravertebral tubercles; 24 to 27 longitudinal rows of ventral scales across the abdomen; six precloacal pores in males, no pores in females; no marked canthal stripe; strongly barred lips; and a spotted to blotched dorsal pattern in adult males and females. We provide a cranial osteological description and a phylogenetic analysis of the new species. The discovery of this new species endemic to Cambodia brings the number of recognized Dixonius species to 2
O.-L.-Vrouw Oorzaak onzer Blijdschap van Tongeren: een middeleeuws fragment in omloop
Get PDFJeroen Reyniers, ‘O.-L.-Vrouw Oorzaak onzer Blijdschap van Tongeren: een middeleeuws fragment in omloop’, Tongerse annalen, 39, 1, juni 2025, p. 72-81
