Downwelling irradiance Ed measured during the cruise MSM139 with RV MARIA S. MERIAN
Data presented here were collected during the cruise MSM139 with MSM139 with RV Maria S. Merian from Reykjavik, Iceland to Reykjavik, Iceland (25.07 - 27.08.2025, working area Greenland). In total, 29 underwater light profiles were collected at 33 stations, using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 189, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 532) and a radiance sensor for upwelling radiance (Lu, SN 421). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 533). The sensors were calibrated by the manufacturer and validated prior to the cruise with a reference lamp. Data were recorded with the SatView software (V 2.9.5_7) and processed from raw to Level1, 1b, 2, 2s to Level 3a using the ProSoft Processing software (V 7.7.19_2). Measured data were binned in 0.5 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 5° were not taken into account during processing. Spectra were interpolated to 1 nm intervals. For each station the hyperspectral profiles for each parameter cover the wavelength range from 400-700 nm, for Ed and Es in [W/m² nm], for Lu in [W/m² nm sr]. For Ed, Lu and Es descriptive statistics are given including min, max, mean, median and standard deviation of the tilt and the photosynthetically active radiation PAR [µmol photons/m² s (sr)], integrated from 400 - 700 nm. Statistics are not given for profiles which do not reach the 1% PAR depth. To allow an assignment of above water conditions to the respective depth measurements, Es spectra were given as a function of depth, recalculated from data Level2s. The Profiler measurements were only conducted during daylight. Raw data are available on request from the principal investigator. Chief Scientist of RV Maria S Merian cruise MSM139: Dr.Uwe John, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI).
- Calculated
- DATE TIME
- DEPTH
- Disco Bay
- ELEVATION
- Ed
- Event label
- GreenHab
- Greenland
- HyperPro II SN 189 ...
- Hyperspectral free ...
- Irradiance
- LATITUDE
- LONGITUDE
- Light Optics
- MSM139
- Maria S Merian
- Melville Bay
- Narsaq
- Nuuk
- Sea Bird
- Spectral irradiance
- Station label
- Uummanaq
- downward
- in water
- in water at 400 nm
- in water at 401 nm
- in water at 402 nm
- in water at 403 nm
- in water at 404 nm
- in water at 405 nm
- in water at 406 nm
- in water at 407 nm
- in water at 408 nm
- in water at 409 nm
- in water at 410 nm
- in water at 411 nm
- in water at 412 nm
- in water at 413 nm
- in water at 414 nm
- in water at 415 nm
- in water at 416 nm
- in water at 417 nm
- in water at 418 nm
- in water at 419 nm
- in water at 420 nm
- in water at 421 nm
- in water at 422 nm
- in water at 423 nm
- in water at 424 nm
- in water at 425 nm
- in water at 426 nm
- in water at 427 nm
- in water at 428 nm
- in water at 429 nm
- in water at 430 nm
- in water at 431 nm
- in water at 432 nm
- in water at 433 nm
- in water at 434 nm
- in water at 435 nm
- in water at 436 nm
- in water at 437 nm
- in water at 438 nm
- in water at 439 nm
- in water at 440 nm
- in water at 441 nm
- in water at 442 nm
- in water at 443 nm
- in water at 444 nm
- in water at 445 nm
- in water at 446 nm
- in water at 447 nm
- in water at 448 nm
- in water at 449 nm
- in water at 450 nm
- in water at 451 nm
- in water at 452 nm
- in water at 453 nm
- in water at 454 nm
- in water at 455 nm
- in water at 456 nm
- in water at 457 nm
- in water at 458 nm
- in water at 459 nm
- in water at 460 nm
- in water at 461 nm
- in water at 462 nm
- in water at 463 nm
- in water at 464 nm
- in water at 465 nm
- in water at 466 nm
- in water at 467 nm
- in water at 468 nm
- in water at 469 nm
- in water at 470 nm
- in water at 471 nm
- in water at 472 nm
- in water at 473 nm
- in water at 474 nm
- in water at 475 nm
- in water at 476 nm
- in water at 477 nm
- in water at 478 nm
- in water at 479 nm
- in water at 480 nm
- in water at 481 nm
- in water at 482 nm
- in water at 483 nm
- in water at 484 nm
- in water at 485 nm
- in water at 486 nm
- in water at 487 nm
- in water at 488 nm
- in water at 489 nm
- in water at 490 nm
- in water at 491 nm
- in water at 492 nm
- in water at 493 nm
- in water at 494 nm
- in water at 495 nm
- in water at 496 nm
- in water at 497 nm
- in water at 498 nm
- in water at 499 nm
- in water at 500 nm
- in water at 501 nm
- in water at 502 nm
- in water at 503 nm
- in water at 504 nm
- in water at 505 nm
- in water at 506 nm
- in water at 507 nm
- in water at 508 nm
- in water at 509 nm
- in water at 510 nm
- in water at 511 nm
- in water at 512 nm
- in water at 513 nm
- in water at 514 nm
- in water at 515 nm
- in water at 516 nm
- in water at 517 nm
- in water at 518 nm
- in water at 519 nm
- in water at 520 nm
- in water at 521 nm
- in water at 522 nm
- in water at 523 nm
- in water at 524 nm
- in water at 525 nm
- in water at 526 nm
- in water at 527 nm
- in water at 528 nm
- in water at 529 nm
- in water at 530 nm
- in water at 531 nm
- in water at 532 nm
- in water at 533 nm
- in water at 534 nm
- in water at 535 nm
- in water at 536 nm
- in water at 537 nm
- in water at 538 nm
- in water at 539 nm
- in water at 540 nm
- in water at 541 nm
- in water at 542 nm
- in water at 543 nm
- in water at 544 nm
- in water at 545 nm
- in water at 546 nm
- in water at 547 nm
- in water at 548 nm
- in water at 549 nm
- in water at 550 nm
- in water at 551 nm
- in water at 552 nm
- in water at 553 nm
- in water at 554 nm
- in water at 555 nm
- in water at 556 nm
- in water at 557 nm
- in water at 558 nm
- in water at 559 nm
- in water at 560 nm
- in water at 561 nm
- in water at 562 nm
- in water at 563 nm
- in water at 564 nm
- in water at 565 nm
- in water at 566 nm
- in water at 567 nm
- in water at 568 nm
- in water at 569 nm
- in water at 570 nm
- in water at 571 nm
- in water at 572 nm
- in water at 573 nm
- in water at 574 nm
- in water at 575 nm
- in water at 576 nm
- in water at 577 nm
- in water at 578 nm
- in water at 579 nm
- in water at 580 nm
- in water at 581 nm
- in water at 582 nm
- in water at 583 nm
- in water at 584 nm
- in water at 585 nm
- in water at 586 nm
- in water at 587 nm
- in water at 588 nm
- in water at 589 nm
- in water at 590 nm
- in water at 591 nm
- in water at 592 nm
- in water at 593 nm
- in water at 594 nm
- in water at 595 nm
- in water at 596 nm
- in water at 597 nm
- in water at 598 nm
- in water at 599 nm
- in water at 600 nm
- in water at 601 nm
- in water at 602 nm
- in water at 603 nm
- in water at 604 nm
- in water at 605 nm
- in water at 606 nm
- in water at 607 nm
- in water at 608 nm
- in water at 609 nm
- in water at 610 nm
- in water at 611 nm
- in water at 612 nm
- in water at 613 nm
- in water at 614 nm
- in water at 615 nm
- in water at 616 nm
- in water at 617 nm
- in water at 618 nm
- in water at 619 nm
- in water at 620 nm
- in water at 621 nm
- in water at 622 nm
- in water at 623 nm
- in water at 624 nm
- in water at 625 nm
- in water at 626 nm
- in water at 627 nm
- in water at 628 nm
- in water at 629 nm
- in water at 630 nm
- in water at 631 nm
- in water at 632 nm
- in water at 633 nm
- in water at 634 nm
- in water at 635 nm
- in water at 636 nm
- in water at 637 nm
- in water at 638 nm
- in water at 639 nm
- in water at 640 nm
- in water at 641 nm
- in water at 642 nm
- in water at 643 nm
- in water at 644 nm
- in water at 645 nm
- in water at 646 nm
- in water at 647 nm
- in water at 648 nm
- in water at 649 nm
- in water at 650 nm
- in water at 651 nm
- in water at 652 nm
- in water at 653 nm
- in water at 654 nm
- in water at 655 nm
- in water at 656 nm
- in water at 657 nm
- in water at 658 nm
- in water at 659 nm
- in water at 660 nm
- in water at 661 nm
- in water at 662 nm
- in water at 663 nm
- in water at 664 nm
- in water at 665 nm
- in water at 666 nm
- in water at 667 nm
- in water at 668 nm
- in water at 669 nm
- in water at 670 nm
- in water at 671 nm
- in water at 672 nm
- in water at 673 nm
- in water at 674 nm
- in water at 675 nm
- in water at 676 nm
- in water at 677 nm
- in water at 678 nm
- in water at 679 nm
- in water at 680 nm
- in water at 681 nm
- in water at 682 nm
- in water at 683 nm
- in water at 684 nm
- in water at 685 nm
- in water at 686 nm
- in water at 687 nm
- in water at 688 nm
- in water at 689 nm
- in water at 690 nm
- in water at 691 nm
- in water at 692 nm
- in water at 693 nm
- in water at 694 nm
- in water at 695 nm
- in water at 696 nm
- in water at 697 nm
- in water at 698 nm
- in water at 699 nm
- in water at 700 nm
- irradiance
- ocean color
- photosynthetically ...
- radiance
- water
| Identifier | |
|---|---|
| DOI | https://doi.pangaea.de/10.1594/PANGAEA.995343 |
| Related Identifier | IsPartOf https://doi.pangaea.de/10.1594/PANGAEA.995340 |
| Related Identifier | References https://doi.org/10.48433/cr_msm139 |
| Metadata Access | https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.995343 |
| Provenance | |
|---|---|
| Creator | Voß, Daniela  ; Henkel, Rohan; Oelker, Julia ; Badewien, Thomas Henry |
| Publisher | PANGAEA |
| Publication Year | 2026 |
| Funding Reference | Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0945A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0945A GreenHAB: Risiken der durch den Klimawandel verursachten schädlichen Algenblüte in grönländischen Gewässern |
| Rights | Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/ |
| OpenAccess | true |
| Representation | |
|---|---|
| Resource Type | Dataset |
| Format | text/tab-separated-values |
| Size | 702830 data points |
| Discipline | Earth System Research |
| Spatial Coverage | (-58.719W, 60.622S, -45.423E, 74.999N) |
| Temporal Coverage Begin | 2025-07-29T10:00:24Z |
| Temporal Coverage End | 2025-08-21T16:34:23Z |