IMIS - Marine Research Groups

Meire, Lorenz
ORCID ResearcherID

Institute
Previous institute
Publications (60)
Datasets (2)

Koninklijk Nederlands Instituut voor Onderzoek der Zee; Estuarine and Delta Systems (EDS), more

Direct contact at institute:
E-mail:

Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie (MARBIOL), more

Function: PhD student

Burdorf L.D.W.; Seitaj D.; Meire L.; Meysman F.J.R. (2017): Laboratory timeseries of high resolution porewater profiles (pH, H2S, O2) demonstrating cable bacteria growth., more
Ollevier, A.; Meire, L.; Bladfort, D.; Develter, R.; Möller, K.O.; Planken, K.; Ponsoni, L.; Schulz, K.; van Oevelen, D.; Boone, W.; Flanders Marine Institute (VLIZ); Royal Netherlands Institute for Sea Research (NIOZ); Helmholtz-Zentrum (Hereon); University of Texas at Austin (UT Austin); (2023): Data from IOPD cruise Part 1 Physical and imaging data. Marine Data Archive., more

A1 Publications (55) [show]
Krawczyk, D.W.; Vonnahme, T.; Burmeister, A.; Maier, S.R.; Blicher, M.E.; Meire, L.; Nygaard, R. (2024). Arctic puzzle: Pioneering a northern shrimp (Pandalus borealis) habitat model in Disko Bay, West Greenland. Sci. Total Environ. 929: 172431. https://dx.doi.org/10.1016/j.scitotenv.2024.172431, more Carlson, D.F.; Vivó-Pons, A.; Treier, U.A.; Mätzler, E.; Meire, L.; Sejr, M.K.; Krause-Jensen, D. (2023). Mapping intertidal macrophytes in fjords in Southwest Greenland using Sentinel-2 imagery. Sci. Total Environ. 865: 161213. https://dx.doi.org/10.1016/j.scitotenv.2022.161213, more Hatton, J.E.; Ng, H.C.; Meire, L.; Woodward, E.M.S.; Leng, M.J.; Coath, C.D.; Stuart-Lee, A.E.; Wang, T.; Annett, A.L.; Hendry, K.R. (2023). Silicon isotopes highlight the role of glaciated fjords in modifying coastal waters. JGR: Biogeosciences 128(7). https://dx.doi.org/10.1029/2022jg007242, more Henson, H.C.; Holding, J.M.; Meire, L.; Rysgaard, S.; Stedmon, C.A.; Stuart-Lee, A.E.; Bendtsen, J.; Sejr, M.K. (2023). Coastal freshening drives acidification state in Greenland fjords. Sci. Total Environ. 855: 158962. https://dx.doi.org/10.1016/j.scitotenv.2022.158962, more Kampouris, I.D.; Gründger, G.F.; Christensen, J.H.; Greer, C.W.; Kjeldsen, K.U.; Boone, W.; Meire, L.; Rysgaard, S.; Vergeynst, L. (2023). Long-term patterns of hydrocarbon biodegradation and bacterial community composition in epipelagic and mesopelagic zones of an Arctic fjord. J. Hazard. Mater. 446: 130656. https://dx.doi.org/10.1016/j.jhazmat.2022.130656, more Krause, J.; Zhu, X.; Höfer, J.; Achterberg, E.P.; Engel, A.; Meire, L.; Stuart-Lee, A.E.; Hopwood, M.J. (2023). Glacier‐Derived Particles as a Regional Control on Marine Dissolved Pb Concentrations. JGR: Biogeosciences 128(10). https://dx.doi.org/10.1029/2023jg007514, more Maselli, M.; Meire, L.; Meire, P.; Hansen, P.J. (2023). Effects of glacial flour on marine micro-plankton: Evidences from natural communities of Greenlandic fjords and experimental studies. Protist 174(1): 125928. https://dx.doi.org/10.1016/j.protis.2022.125928, more Meire, L.; Paulsen, M.L.; Meire, P.; Rysgaard, S.; Hopwood, M.J.; Sejr, M.K.; Stuart-Lee, A.; Sabbe, K.; Stock, W.; Mortensen, J. (2023). Glacier retreat alters downstream fjord ecosystem structure and function in Greenland. Nature Geoscience 16(8): 671-674. https://dx.doi.org/10.1038/s41561-023-01218-y, more Nielsen, J.; Estévez-Barcia, D.; Post, S.; Christensen, H.T.; Retzel, A.; Meire, L.; Riget, F.; Strøm, J.F.; Rikardsen, A.H.; Hedeholm, R. (2023). Validation of pop-up satellite archival tags (PSATs) on Atlantic cod (Gadus morhua) in a Greenland fjord. Fish. Res. 266: 106782. https://dx.doi.org/10.1016/j.fishres.2023.106782, more Stuart-Lee, A.E.; Mortensen, J.; Juul-Pedersen, T.; Middelburg, J.J.; Soetaert, K.; Hopwood, M.J.; Engel, A.; Meire, L. (2023). Influence of glacier type on bloom phenology in two Southwest Greenland fjords. Est., Coast. and Shelf Sci. 284: 108271. https://dx.doi.org/10.1016/j.ecss.2023.108271, more Vonnahme, T.R.; Nowak, A.; Hopwood, M.J.; Meire, L.; Søgaard, D.H.; Krawczyk, D.W.; Kalhagen, K.; Juul-Pedersen, T. (2023). Impact of winter freshwater from tidewater glaciers on fjords in Svalbard and Greenland; A review. Prog. Oceanogr. 219: 103144. https://dx.doi.org/10.1016/j.pocean.2023.103144, more Lin, G.; Lin, M.; Qiao, J.; Sejr, M.K.; Steier, P.; Meire, L.; Stedmon, C.A. (2022). Estimation of Atlantic Water transit times in East Greenland fjords using a ²³³U-²³⁶U tracer approach. Chem. Geol. 607: 121007. https://dx.doi.org/10.1016/j.chemgeo.2022.121007, more Mortensen, J.; Rysgaard, S.; Winding, M.H.S.; Juul-Pedersen, T.; Arendt, K.E.; Lund, H.; Stuart-Lee, A.E.; Meire, L. (2022). Multidecadal water mass dynamics on the West Greenland shelf. JGR: Oceans 127(7): e2022JC018724. https://dx.doi.org/10.1029/2022jc018724, more Sejr, M.K.; Bruhn, A.; Dalsgaard, T.; Juul-Pedersen, T.; Stedmon, C.A.; Blicher, M.; Meire, L.; Mankoff, K.D.; Thyrring, J. (2022). Glacial meltwater determines the balance between autotrophic and heterotrophic processes in a Greenland fjord. Proc. Natl. Acad. Sci. U.S.A. 119(52). https://dx.doi.org/10.1073/pnas.2207024119, more Straneo, F.; Slater, D.; Bouchard, C.; Cape, M.; Carey, M.; Ciannelli, L.; Holte, J.; Matrai, P.; Laidre, K.; Little, C.; Meire, L.; Seroussi, H.; Vernet, M. (2022). An interdisciplinary perspective on Greenland’s changing coastal margins. Oceanography 35(3-4): 106-117. https://dx.doi.org/10.5670/oceanog.2022.128, more van Genuchten, C.M.; Hopwood, M.J.; Liu, T.; Krause, J.; Achterberg, E.P.; Rosing, M.T.; Meire, L. (2022). Solid-phase Mn speciation in suspended particles along meltwater-influenced fjords of West Greenland. Geochim. Cosmochim. Acta 326: 180-198. https://dx.doi.org/10.1016/j.gca.2022.04.003, more Allan, E.; de Vernal, A.; Seidenkrantz, M.-S.; Briner, J.P.; Hillaire-Marcel, C.; Pearce, C.; Meire, L.; Røy, H.; Mathiasen, A.M.; Nielsen, M.T.; Plesner, J.L.; Perner, K. (2021). Insolation vs. meltwater control of productivity and sea surface conditions off SW Greenland during the Holocene. Boreas 50(3): 631-651. https://doi.org/10.1111/bor.12514, more Bendtsen, J.; Rysgaard, S.; Carlson, D.F.; Meire, L.; Sejr, M.K. (2021). Vertical mixing in stratified fjords near tidewater outlet glaciers along Northwest Greenland. JGR: Oceans 126(8): e2020JC016898. https://dx.doi.org/10.1029/2020jc016898, more Hawkings, J.R.; Linhoff, B.S.; Wadham, J.L.; Stibal, M.; Lamborg, C.H.; Carling, G.T.; Lamarche-Gagnon, G.; Kohler, T.J.; Ward, R.; Hendry, K.R.; Falteisek, L.; Kellerman, A.M.; Cameron, K.A.; Hatton, J.E.; Tingey, S.; Holt, A.D.; Vinšová, P.; Hofer, S.; Bulínová, M.; Větrovský, T.; Meire, L.; Spencer, R.G.M. (2021). Large subglacial source of mercury from the southwestern margin of the Greenland Ice Sheet. Nature Geoscience 14(7): 496–502. https://dx.doi.org/10.1038/s41561-021-00753-w, more Hawkings, J.R.; Linhoff, B.S.; Wadham, J.L.; Stibal, M.; Lamborg, C.H.; Carling, G.T.; Lamarche-Gagnon, G.; Kohler, T.J.; Ward, R.; Hendry, K.R.; Falteisek, L.; Kellerman, A.M.; Cameron, K.A.; Hatton, J.E.; Tingey, S.; Holt, A.D.; Vinšová, P.; Hofer, S.; Bulínová, M.; Větrovský, T.; Meire, L.; Spencer, R.G.M. (2021). Author Correction: Large subglacial source of mercury from the southwestern margin of the Greenland Ice Sheet. Nature Geoscience 14(8): 631-631. https://dx.doi.org/10.1038/s41561-021-00804-2, more Hendry, K.R.; Briggs, N.; Henson, S.; Opher, J.; Brearley, J.A.; Meredith, M.P.; Leng, M.J.; Meire, L. (2021). Tracing glacial meltwater from the Greenland ice sheet to the ocean using gliders. JGR: Oceans 126(8): e2021JC017274. https://dx.doi.org/10.1029/2021jc017274, more Krause, J.; Hopwood, M.J.; Höfer, J.; Krisch, S.; Achterberg, E.P.; Alarcón, E.; Carroll, D.; González, H.E.; Juul-Pedersen, T.; Liu, T.; Lodeiro, P.; Meire, L.; Rosing, M.T. (2021). Trace element (Fe, Co, Ni and Cu) dynamics across the salinity gradient in Arctic and Antarctic glacier fjords. Front. Earth Sci. 9: 725279. https://dx.doi.org/10.3389/feart.2021.725279, more Stranne, C.; Nilsson, J.; Ulfsbo, A.; O'Regan, M.; Coxall, H.K.; Meire, L.; Muchowski, J.; Mayer, L.A.; Brüchert, V.; Fredriksson, J.; Thornton, B.F.; Chawarski, J.; West, G.; Weidner, E.; Jakobsson, M. (2021). The climate sensitivity of northern Greenland fjords is amplified through sea-ice damming. Commun. Earth Environ. 2: 70. https://dx.doi.org/10.1038/s43247-021-00140-8, more Stuart-Lee, A.E.; Mortensen, J.; van der Kaaden, A.-S.; Meire, L. (2021). Seasonal hydrography of Ameralik: a southwest Greenland fjord impacted by a land‐terminating glacier. JGR: Oceans 126(12): e2021JC017552. https://dx.doi.org/10.1029/2021jc017552, more van Genuchten, C.M.; Rosing, M.T.; Hopwood, M.J.; Liu, T.; Krause, J.; Meire, L. (2021). Decoupling of particles and dissolved iron downstream of Greenlandic glacier outflows. Earth Planet. Sci. Lett. 576: 117234. https://dx.doi.org/10.1016/j.epsl.2021.117234, more Hopwood, M.J.; Carroll, D.; Dunse, T.; Hodson, A.; Holding, J.M.; Iriarte, J.L.; Ribeiro, S.; Achterberg, E.P.; Cantoni, C.; Carlson, D.F.; Chierici, M.; Clarke, J.S.; Cozzi, S.; Fransson, A.; Juul-Pedersen, T.; Winding, M.H.S.; Meire, L. (2020). Review article: How does glacier discharge affect marine biogeochemistry and primary production in the Arctic? Cryosphere 14(4): 1347-1383. https://dx.doi.org/10.5194/tc-14-1347-2020, more Luostarinen, T.; Ribeiro, S.; Weckström, K.; Sejr, M.K.; Meire, L.; Tallberg, P.; Heikkila, M. (2020). An annual cycle of diatom succession in two contrasting Greenlandic fjords: from simple sea-ice indicators to varied seasonal strategists. Mar. Micropaleontol. 158: 101873. https://doi.org/10.1016/j.marmicro.2020.101873, more Mortensen, J.; Rysgaard, S.; Bendtsen, J.; Lennert, K.; Kanzow, T.; Lund, H.; Meire, L. (2020). Subglacial discharge and its down‐fjord transformation in West Greenland fjords with an ice mélange. JGR: Oceans 125(9): e2020JC016301. https://doi.org/10.1029/2020jc016301, more Nielsen, J.; Rosing-Asvid, A.; Meire, L.; Nygaard, R. (2020). Widespread occurrence of pink salmon (Oncorhynchus gorbuscha) throughout Greenland coastal waters ) throughout Greenland coastal waters. J. Fish Biol. 96(6): 1505-1507. https://dx.doi.org/10.1111/jfb.14318, more Rysgaard, S.; Boone, W.; Carlson; Sejr, M.K.; Bendtsen, J.; Juul-Pedersen, T.; Lund; Meire, L.; Mortensen, J. (2020). An updated view on water masses on the pan‐west Greenland continental shelf and their link to proglacial fjords. JGR: Oceans 125(2): e2019JC015564. https://dx.doi.org/10.1029/2019jc015564, more Carlson, D.F.; Pasma; Jacobsen; Hansen; Thomsen; Lillethorup; Tirsgaard; Flytkjær; Melvad; Laufer; Lund-Hansen, L.C.; Meire, L.; Rysgaard, S. (2019). Retrieval of ice samples using the ice drone. Front. Earth Sci. 7. https://dx.doi.org/10.3389/feart.2019.00287, more Grønkjaer, P.; Nielsen, K.V.; Zoccarato, G.; Meire, L.; Rysgaard, S.; Hedeholm, R.B. (2019). Feeding ecology of capelin (Mallotus villosus) in a fjord impacted by glacial meltwater (Godthåbsfjord, Greenland). Polar Biol. 42(1): 81-98. https://dx.doi.org/10.1007/s00300-018-2400-8, more Holding, J.; Markager, S.; Juul-Pedersen, T.; Paulsen, M.L.; Møller, E.F.; Meire, L.; Sejr, M.K. (2019). Seasonal and spatial patterns of primary production in a high-latitude fjord affected by Greenland Ice Sheet run-off. Biogeosciences 16(19): 3777-3792. https://dx.doi.org/10.5194/bg-16-3777-2019, more Hopwood, M.J.; Carroll, D.; Höfer, J.; Achterberg, E.P.; Meire, L.; Le Moigne, F.A.C.; Bach, L.T.; Eich, C.; Sutherland, D.A.; González, H.E. (2019). Highly variable iron content modulates iceberg-ocean fertilisation and potential carbon export. Nature Comm. 10(1): 10 pp. https://dx.doi.org/10.1038/s41467-019-13231-0, more Søgaard, D. H. ; Deming, J.W.; Meire, L.; Rysgaard, S. (2019). Effects of microbial processes and CaCO₃ dynamics on inorganic carbon cycling in snow-covered Arctic winter sea ice. Mar. Ecol. Prog. Ser. 611: 31-44. https://dx.doi.org/10.3354/meps12868, more Straneo, F.; Sutherland, D.A.; Stearns, L.; Catania, G.; Heimbach, P.; Moon, T.; Cape, M.R.; Laidre, K.L.; Barber, D.; Rysgaard, S.; Mottram, R.; Olsen, S.; Hopwood, M.J.; Meire, L. (2019). The case for a sustained Greenland Ice Sheet-Ocean Observing System (GrIOOS). Front. Mar. Sci. 6: 138. https://dx.doi.org/10.3389/fmars.2019.00138, more Vergeynst, L.; Christensen, J.H.; Kjeldsen, K.U.; Meire, L.; Boone, W.; Malmquist, L.M.V.; Rysgaard, S. (2019). In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice. Wat. Res. 148: 459-468. https://dx.doi.org/10.1016/j.watres.2018.10.066, more Vergeynst, L.; Greer, C.W.; Mosbech, A.; Gustavson, K.; Meire, L.; Poulsen, K.G.; Christensen, J.H. (2019). Biodegradation, photo-oxidation, and dissolution of petroleum compounds in an Arctic fjord during summer. Environ. Sci. Technol. 53(21): 12197-12206. https://dx.doi.org/10.1021/acs.est.9b03336, more Boone, W.; Rysgaard, S.; Carlson, D.F.; Meire, L.; Kirillov, S.; Mortensen, J.; Dmitrenko, I.; Vergeynst, L.; Sejr, M.K. (2018). Coastal freshening prevents fjord bottom water renewal in Northeast Greenland: A mooring study from 2003 to 2015. Geophys. Res. Lett. 45(6): 2726-2733. https://doi.org/10.1002/2017GL076591, more Hopwood, M.J.; Carroll, D.; Browning, T. J.; Meire, L.; Mortensen, J.; Krisch, S.; Achterberg, E.P. (2018). Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland. Nature Comm. 9(1): 3256. https://doi.org/10.1038/s41467-018-05488-8, more Krawczyk, D.W.; Meire, L.; Lopes, C.; Juul-Pedersen, T.; Mortensen, J.; Li, C.L.; Krogh, T. (2018). Seasonal succession, distribution, and diversity of planktonic protists in relation to hydrography of the Godthåbsfjord system (SW Greenland). Polar Biol. 41: 2033-2052. https://dx.doi.org/10.1007/s00300-018-2343-0, more Mortensen, J.; Rysgaard, S.; Arendt, K.E.; Søgaard, D. H. ; Bendtsen, J.; Meire, L. (2018). Local coastal water masses control heat levels in a west Greenland tidewater outlet glacier fjord. JGR: Oceans 123(11): 8068-8083. https://doi.org/10.1029/2018JC014549, more Ørberg, S.B.; Krause-Jensen, D.; Meire, L.; Sejr, M.K. (2018). Subtidal benthic recruitment in a sub-arctic glacial fjord system: Temporal and spatial variability and potential drivers. Polar Biol. 41(12): 2627-2634. https://doi.org/10.1007/s00300-018-2390-6, more Vasquez Cardenas, D.; Meire, L.; Sørensen, H.L.; Glud, R.N.; Meysman, F.J.R.; Boschker, H.T.S. (2018). Bacterial chemoautotrophic reoxidation in sub-Arctic sediments: a seasonal study in Kobbefjord, Greenland. Mar. Ecol. Prog. Ser. 601: 33-39. https://doi.org/10.3354/meps12669, more Boone, W.; Rysgaard, S.; Kirillov, S.; Dmitrenko, I.A.; Bendtsen, J.; Mortensen, J.; Meire, L.; Petrusevich, V.; Barber, D.G. (2017). Circulation and fjord-shelf exchange during the ice-covered period in Young Sound-Tyrolerfjord, Northeast Greenland (74°N). Est., Coast. and Shelf Sci. 194: 205-216. https://dx.doi.org/10.1016/j.ecss.2017.06.021, more Burdorf, L.D.W.; Tramper, A.; Seitaj, D.; Meire, L.; Hidalgo-Martinez, S.; Zetsche, E.-M.; Boschker, H.T.S.; Meysman, F.J.R. (2017). Long-distance electron transport occurs globally in marine sediments. Biogeosciences 14(3): 683-701. https://dx.doi.org/10.5194/bg-14-683-2017, more Carlson, D.F.; Boone, W.; Meire, L.; Abermann, J.; Rysgaard, S. (2017). Bergy bit and melt water trajectories in Godthåbsfjord (SW Greenland) observed by the Expendable Ice Tracker. Front. Mar. Sci. 4: 276. https://dx.doi.org/10.3389/fmars.2017.00276, more Meire, L.; Mortensen, J.; Meire, P.; Juul-Pedersen, T.; Sejr, M.K.; Rysgaard, S.; Nygaard, R.; Huybrechts, P.; Meysman, F.J.R. (2017). Marine-terminating glaciers sustain high productivity in Greenland fjords. Glob. Chang. Biol. 23(12): 5344-5357. https://dx.doi.org/10.1111/gcb.13801, more Hopwood, M.J.; Connelly, D.P.; Arendt, K.E.; Juul-Pedersen, T.; Stinchcombe, M.C.; Meire, L.; Esposito, M.; Krishna, R. (2016). Seasonal changes in Fe along a glaciated Greenlandic fjord. Front. Earth Sci. 4: 13 pp. https://dx.doi.org/10.3389/feart.2016.00015, more Meire, L.; Meire, P.; Struyf, E.; Krawczyk, D.W.; Arendt, K.E.; Yde, J.C.; Juul-Pedersen, T.; Hopwood, M.J.; Rysgaard, S.; Meysman, F.J.R. (2016). High export of dissolved silica from the Greenland Ice Sheet. Geophys. Res. Lett. 43(17): 9173-9182. https://dx.doi.org/10.1002/2016GL070191, more Meire, L.; Mortensen, J.; Rysgaard, S.; Bendtsen, J.; Boone, W.; Meire, P.; Meysman, F.J.R. (2016). Spring bloom dynamics in a subarctic fjord inﬂuenced by tidewater outlet glaciers (Godthåbsfjord, SW Greenland). Journal of Geophysical Research-Atmospheres 121(6): 1581-1592. https://dx.doi.org/10.1002/2015JG003240, more Krause-Jensen, D.; Duarte, C.M.; Hendriks, I.E.; Meire, L.; Blicher, M.E.; Marba, N.; Sejr, M.K. (2015). Macroalgae contribute to nested mosaics of pH variability in a subarctic fjord. Biogeosciences 12(16): 4895-4911. dx.doi.org/10.5194/bg-12-4895-2015, more Meire, L.; Sogaard, D.H.; Mortensen, J.; Meysman, F.J.R.; Soetaert, K.; Arendt, K.E.; Juul-Pedersen, T.; Blicher, T.E.; Rysgaard, S. (2015). Glacial meltwater and primary production are drivers of strong CO₂ uptake in fjord and coastal waters adjacent to the Greenland Ice Sheet. Biogeosciences 12(8): 2347-2363. https://dx.doi.org/10.5194/bg-12-2347-2015, more Sørensen, H.L.; Meire, L.; Juul-Pedersen, T.; de Stigter, H.; Meysman, F.J.R.; Rysgaard, S.; Thamdrup, B.; Glud, R.N. (2015). Seasonal carbon cycling in a Greenlandic fjord: an integrated pelagic and benthic study. Mar. Ecol. Prog. Ser. 539: 1-17. https://dx.doi.org/10.3354/meps11503, more Meire, L.; Soetaert, K.; Meysman, F.J.R. (2013). Impact of global change on coastal oxygen dynamics and risk of hypoxia. Biogeosciences 10(4): 2633-2653. https://dx.doi.org/10.5194/bg-10-2633-2013, more
Book [show]
Meire, L.; Soetaert, K.; Meysman, F. (2011). Impact of global change on coastal hypoxia [PPT]. Oceans & Lakes, Interuniversity Master in Marine and Lacustrine Science and Management/NIOZ: Brussel. 10 pp., more
Theses (2) [show]
Meire, L. (2016). Biogeochemical cycling in a subarctic fjord adjacent to the Greenland Ice Sheet. PhD Thesis. Universiteit Gent/NIOZ: Gent. 199 pp., more Meire, L. (2011). Impact of global change on coastal hypoxia. MSc Thesis. Universiteit Gent; MARELAC: Gent. 53 pp., more
Abstracts (2) [show]
Burdorf, L.D.W.; Malkin, S.Y.; Seitaj, D.; Meire, L.; Cook, P.L.M.; Meysman, F.J.R. (2015). Long distance electron transport by cable bacteria in marine sediments: a global phenomenon, in: Mees, J. et al. (Ed.) Book of abstracts – VLIZ Young Scientists’ Day. Brugge, Belgium, 20 February 2015. VLIZ Special Publication, 71: pp. 28, more Meire, L. (2012). De invloed van globale klimaatsverandering op hypoxia, in: Mees, J. et al. (Ed.) Book of abstracts - VLIZ Young Marine Scientists' Day. Brugge, Belgium, 24 February 2012. VLIZ Special Publication, 55: pp. 3-5, more

You are here

IMIS - Marine Research Groups